Suspend HHVM testing due to PHP 7 mode issues

- Suspend HHVM testing until the following items are resolved
  - HHVM PHP 7 mode issues.
    - facebook/hhvm#7626 php 7 mode not recognized by composer as PHP 7
    - facebook/hhvm#7198 type annotations on internal functions, `expects parameter 1 to be _______, null given`
    - facebook/hhvm#7544 HHVM INI settings for PHP7 mode `php 7 is not the same as php 7.1`
  - Trusty Container issues (currently beta)
    - https://github.com/travis-ci/travis-ci/issues/6842 - MySQL socket issue on Trusty beta Container (assume fixed sometime after 1Q17)
- Add line to Force hhvm PHP 7 mode for future testing
  - HHVM fails on composer `This package requires php ^7.0 but your HHVM version does not satisfy that requirement`
  - reference for change https://docs.hhvm.com/hhvm/configuration/INI-settings#php-7-settings

.travis.yml

@@ -32,13 +32,13 @@ matrix:
       env: DB=mariadb MARIADB_VERSION=10.0
       addons:
         mariadb: 10.0
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next Trusty update
-      addons:
-        mariadb: 10.0
-      env: DB=mariadb MARIADB_VERSION=10.0
+ #   - php: hhvm
+ #     sudo: true
+ #     dist: trusty
+ #     group: edge # until the next Trusty update
+ #     addons:
+ #       mariadb: 10.0
+ #     env: DB=mariadb MARIADB_VERSION=10.0
 
     - php: 7.0
       env: DB=mariadb MARIADB_VERSION=10.1
@@ -52,13 +52,13 @@ matrix:
       env: DB=mariadb MARIADB_VERSION=10.1
       addons:
         mariadb: 10.1
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next Trusty update
-      addons:
-        mariadb: 10.1
-      env: DB=mariadb MARIADB_VERSION=10.1
+ #   - php: hhvm
+ #     sudo: true
+ #     dist: trusty
+ #     group: edge # until the next Trusty update
+ #     addons:
+ #       mariadb: 10.1
+ #     env: DB=mariadb MARIADB_VERSION=10.1
 
     - php: 7.0
       addons:
@@ -167,80 +167,80 @@ matrix:
         - postgresql
       env: DB=pgsql POSTGRESQL_VERSION=9.6
 
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      addons:
-        apt:
-          packages:
-            - mysql-server-5.6
-            - mysql-client-core-5.6
-            - mysql-client-5.6
-      services:
-        - mysql
-      env: DB=mysql
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      addons:
-        apt:
-          packages:
-            - mysql-server-5.6
-            - mysql-client-core-5.6
-            - mysql-client-5.6
-      services:
-        - mysql
-      env: DB=mysqli
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      addons:
-        postgresql: "9.2"
-      services:
-        - postgresql
-      env: DB=pgsql POSTGRESQL_VERSION=9.2
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      addons:
-        postgresql: "9.3"
-      services:
-        - postgresql
-      env: DB=pgsql POSTGRESQL_VERSION=9.3
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      addons:
-        postgresql: "9.4"
-      services:
-        - postgresql
-      env: DB=pgsql POSTGRESQL_VERSION=9.4
-    - php: hhvm
-      sudo: false
-      dist: trusty
-      addons:
-        postgresql: "9.5"
-      services:
-        - postgresql
-      env: DB=pgsql POSTGRESQL_VERSION=9.5
-    - php: hhvm
-      sudo: false
-      dist: trusty
-      addons:
-        postgresql: "9.6"
-      services:
-        - postgresql
-      env: DB=pgsql POSTGRESQL_VERSION=9.6
-    - php: hhvm
-      sudo: true
-      dist: trusty
-      group: edge # until the next update
-      env: DB=sqlite
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      addons:
+#        apt:
+#          packages:
+#            - mysql-server-5.6
+#            - mysql-client-core-5.6
+#            - mysql-client-5.6
+#      services:
+#        - mysql
+#      env: DB=mysql
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      addons:
+#        apt:
+#          packages:
+#            - mysql-server-5.6
+#            - mysql-client-core-5.6
+#            - mysql-client-5.6
+#      services:
+#        - mysql
+#      env: DB=mysqli
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      addons:
+#        postgresql: "9.2"
+#      services:
+#        - postgresql
+#      env: DB=pgsql POSTGRESQL_VERSION=9.2
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      addons:
+#        postgresql: "9.3"
+#      services:
+#        - postgresql
+#      env: DB=pgsql POSTGRESQL_VERSION=9.3
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      addons:
+#        postgresql: "9.4"
+#      services:
+#        - postgresql
+#      env: DB=pgsql POSTGRESQL_VERSION=9.4
+#    - php: hhvm
+#      sudo: false
+#      dist: trusty
+#      addons:
+#        postgresql: "9.5"
+#      services:
+#        - postgresql
+#      env: DB=pgsql POSTGRESQL_VERSION=9.5
+#    - php: hhvm
+#      sudo: false
+#      dist: trusty
+#      addons:
+#        postgresql: "9.6"
+#      services:
+#        - postgresql
+#      env: DB=pgsql POSTGRESQL_VERSION=9.6
+#    - php: hhvm
+#      sudo: true
+#      dist: trusty
+#      group: edge # until the next update
+#      env: DB=sqlite
   allow_failures:
     - php: hhvm
     - php: nightly
@@ -256,6 +256,10 @@ matrix:
     - php: 7.1
       env: DB=pgsql POSTGRESQL_VERSION=9.6
 
+before_install:
+  # Force hhvm PHP 7 mode
+  - if [[ $TRAVIS_PHP_VERSION = hhv* ]]; then echo hhvm.php7.all=1 >> /etc/hhvm/php.ini; fi
+
 install:
   - travis_retry composer install