Merge branch 'feature/#6722-db-order-accepts-expressioninterface'

Close #6722
Fix for Zend\Db\TableGateway: Alias for table #6726
Add unit test passing all possible variants of table identifier
Fix spacing
#6726 #6740 - adding `@group` annotation for newly introduced tests
Merge branch 'hotfix/#6726-#6740-tablegateway-table-alias' into develop

Close #6726
Close #6740
Forward port #6726
Forward port #6740