scl build fixes

- add v8314 to scl enable for rubygem-openshift-origin-admin-console,
  rubygem-openshift-origin-console and openshift-origin-console
use repquota for xfs - bz1128932
Fix bug 1131089: use correct mysql client for 5.5
Document PHP env vars
Bug 1130496: Blocking carts with 2+ min gears in non-scalable apps
bz1131404 - ProxyPassReverse fix
fix accept-node for vhost vs rewrite plugin presence
Merge pull request #5726 from rajatchopra/vhost

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Merge pull request #5725 from abhgupta/abhgupta-dev

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Merge pull request #5727 from rajatchopra/master

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Merge pull request #5728 from VojtechVitek/document_php_env_vars

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Merge pull request #5718 from rajatchopra/xfs

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Bump cartridge versions for Sprint 49
Merge pull request #5722 from pmorie/bugs/1131089

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Update extended test for online/enterprise
use unique filenames for each TestApp persisted file
Merge pull request #5729 from soltysh/latest_versions

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put apache reload in guard of an env variable
Merge pull request #5730 from detiber/entTestFix

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Merge pull request #5732 from rajatchopra/master

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