MDLSITE-3651 Add php_lint to prechecker
MDLSITE-3651 enable some checks to disable filtering of results

* And add line number to php_lint so it'll be linked to the file
* Disable filtering of php_lint results - as filtering could mask some
  things unintentionally.
MDLSITE-3651 - fix php warning
Merge pull request #32 from danpoltawski/MDLSITE-3651

MDLSITE-3651 Add php_lint to prechecker