vhost-plugin: switch from rewrite back to proxypass

Switch the primary traffic proxy for the vhost frontend plugin.
There are still other RewriteRule's that do the setting of
variables, etc.
Make nodejs watch just a single file by default instead of REPO_DIR
Refactor the way how we check if compilation of assets is necessary (ruby)
Merge pull request #4904 from mfojtik/card_156

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Merge pull request #4905 from mfojtik/card_151

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add jython to jboss cartridges
Bug 1073934 - Check the ERB safe-level for python openshift.conf.erb
Merge pull request #4920 from maxamillion/maxamillion/add_jython

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Merge pull request #4922 from mfojtik/bugzilla/1073934

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Adding methods for version comparisons to the cartridge sdk
Adding tests for cartridge sdk version comparisons
Bug 1070719 - Prevent openshift-watchman from running twice
Merge pull request #4917 from brenton/sdk_version_comparison1

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Blocking rollback once the gear/cart removal is underway
Merge pull request #4926 from abhgupta/abhgupta-dev

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Merge pull request #4925 from jwhonce/bug/1070719

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Bug 1073395: Fixing precedence issue in condition
Speeding up tests
Merge pull request #4928 from danmcp/master

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Bug 1071105 - On validation just print commit timestamp