Fixes #1827: Gii wasn't properly handling table name with the schema part for PostgreSQL.
Fixes #2299: CMssqlSchema: findTableNames(), getTables() and getTableNames() methods used to prepend schema prefix to the table names twice.
Merge branch 'master' of github.com:yiisoft/yii into 1827-gii-pgsql-schema-name
Merge pull request #2291 from resurtm/1827-gii-pgsql-schema-name

Fixes #1827: Gii wasn't properly handling table name with the schema part for PostgreSQL.