Connect on get resource, for quoteValue
IBM Does not need the resource
Check if connection already is connected, and add unit test for PDO Connection getResource method
Cleaned up docblock
Merge branch 'hotfix/4138'

Close #4138
Fixes #4134
+ fixed naming 
+ added test for pgsql
+ fix pgsql test for empty string
PR #4078
Merge branch 'fix-db-resource' of git://github.com/Mech7/zf2 into Mech7-fix-db-resource
PR #4078 Additions
- added preservation of lazy loading to Platform
- added error checking on pg_connect()
Forward #4087
Merge branch 'Mech7-fix-db-resource' into develop