Fix for bug 1047950 and bug 1047952
Card online_node_319 - Add quota check to git push

* Add Node#check_quotas to centralized quota reporting
* Refactor openshift#report_quota to use new method
* Add call to check_quotas to cartridge_actions#post_receive if stderr is provided
Merge pull request #4421 from abhgupta/abhgupta-scheduler

Merged by openshift-bot
Merge pull request #4423 from jwhonce/online_node_319

Merged by openshift-bot