Fix more occurances of the extending Test bug, "reactivating" a total of 200 tests. SQLAnywhere is missing and is a bit more annyoing to fix, because of a deep inheritance hierachy.

Fix some assertion and CS in schema manager functional tests

Implement ExceptionConverterDriver in Oracle drivers

Fix parsing SQL Server bracket delimiters in SQL statements

Add missing driver exception subclasses

Fix Oracle test suite

[DBAL-558] Fix parsing parameters in quoted text with backslash

[DBAL-234] [DBAL-566] Add support for renaming indexes

Fix full qualified table name schema introspection

Fix table alteration on Drizzle

[DBAL-472] Fix altering column from notnull to null in Oracle

Fix dropping table without autoincrement trigger in Oracle

[DBAL-553] Add support for native JSON type on capable platforms

Connection: Replaced ! is_int with is_string

[DBAL-685] Add servicename connection parameter to Oracle drivers

Fix foreign key columns order in Oracle

Fix column default value introspection in Oracle

Fix foreign key propagation on non-supporting MySQL table engines

[DBAL-552] Fix parsing backtick quoted statement fragments in SQLParserUtils

Fix index flags