fix some phpdoc

[DBAL-335] Fix nasty bug in MasterSlaveConnection, connecting and writing to slave when using keepSlave option.

Set default session value for NLS_NUMERIC_CHARACTERS (Bugfix for DDC-2013)

Change default MySQL table collation to utf8_unicode_ci

params not passed from execute to logger

When parameters are passed to Doctrine\DBAL\Statement::execute, they are not passed to any enabled logger(s).

Default table collation changed to `utf8_unicode_ci`, as it handles properly a much wider array of characters (Cyrillic, for example) at a generally negligible cost of performance.

Bugfix DDC-2013 - Default Session Value ".," for "NLS_NUMERIC_CHARACTERS". This is needed because Oracle uses other characters for decimal separation depending on the servers locale

Fixed mini-typo

Small test fixes for PostgreSQL

Based on whether we are on 32 or 64 bit platform, postgres will return a string or an int for the expected php type of a bigint that is > 32 bits.

Use dropAndCreateDatabase schema manager function in test initialization instead of individual versions of each.

Fix DDC-1978

ExpressionBuilder in and notIn methods

Changed 'implements' by 'extends' on SQLAzureFederationsSynchronizer