Current schema
Default, unique and persistent connections
Charset support for connection
The configuration key for connection to Oracle Database was renamed from "instance" to "hostname".
syntax fix
:Merge branch 'master' into oracle_fix
Merge branch 'hotfix/3663'

Close #3663
Merge branch 'oracle_fix' of git://github.com/hamilok/zf2 into hamilok-oracle_fix
Zend\Db\Adapter - OCI8 Connection
* Fixed up connect() method to allow looser connection options
* removed call_user_func() in favor of direct function calling
Merge branch 'hamilok-oracle_fix' into develop