Fixes #6082
move individual function into data provider instead
Merge branch 'db-join-expression' of git://github.com/samsonasik/zf2 into hotfix/6086

* 'db-join-expression' of git://github.com/samsonasik/zf2:
  move individual function into data provider instead
  Fixes #6082
Closes #6086
Merge branch 'hotfix/6086'

* hotfix/6086:
  move individual function into data provider instead
  Fixes #6082