Bug 970257 - Allow git@ urls

Also support reflog tracking, and the ability to deliver a commit from a fragment.  Perform a bit more URL validation on initial_git_url
Allow clients to pass an initial_git_url of "empty", which creates a bare repo but does not add a commit.  When 'empty' is passed, the node will skip starting the gear and also skip the initial build.  This allows clients that want to send a local Git repository (one that isn't visible to OpenShift.com, for example) to avoid having to push/merge/delete the initial commit, and instead submit their own clean repo.  In this case, the user will get a result indicating that their repository is empty.

Also resolves 977985 by removing the message.
Merge remote-tracking branch 'origin/master' into bug_970257_support_git_at_urls

Conflicts:
	node/lib/openshift-origin-node/model/v2_cart_model.rb
Merge remote-tracking branch 'origin/master' into bug_970257_support_git_at_urls

Conflicts:
	controller/app/controllers/applications_controller.rb
	node/lib/openshift-origin-node/model/application_container.rb
Tests pass fully (add initial_git_url for earlier api versions).  Control what values of URI get persisted to DB (passwords and userinfo from clone specs should not be)
Changes:
Link path correction
Merge pull request #2927 from smarterclayton/bug_970257_support_git_at_urls

Merged by openshift-bot
Bug 977034 - Removing IDENT breaks deconfigure
Bug 977034 - Removing IDENT breaks destroy

* introduced error when logging error message
Merge pull request #2968 from jwhonce/bug/977034

Merged by openshift-bot
oo-admin-ctl-usage fixes: Create index on 'gear_id'+'usage_type'+'created_at' fields for usage_records mongo collection.
Take full screenshots when web tests fail
Added test for adding domain env variable
PODO-61 Added tests for adding and removing domain wide environment variables
Updated platform-oo-admin.feature testing adding and removing domain wide env variables
Bug 979991

Clarify the purpose of npm_global_module_list
Merge pull request #2970 from liggitt/full_screenshot

Merged by openshift-bot
Merge pull request #2969 from pravisankar/dev/ravi/usage-sync-fixes

Merged by openshift-bot
Remove Online specific references:
-Remove hard-coded cart name references.
-Remove login validations from CloudUser model, login validation must be done by authentication plugin.
-Remove 'medium' gear size references
-All 'small' gear size references must be from configuration files.
-Remove stale application_observer.rb and its references
-Remove stale 'abstract' cart references
-Remove duplicate code from rest controllers
-Move all get_rest_{user,domain,app,cart} methods in RestModelHelper module.
-Cleanup unnecessary TODO/FIXME comments in broker.