oo-diagnostics: test_node_containerization_plugin

Add the test_node_containerization_plugin test to ensure that
OPENSHIFT_NODE_PLUGINS in /etc/openshift/node.conf does not include
unix_user_observer.
Remove references to deprecated MONGO_REPLICA_SETS

Remove references in the default broker.conf and documentation to the
MONGO_REPLICA_SETS setting, which was removed in commit
2449f2e62b47f8a7e1e69ea0c1db7419b82a167e and commit
4346b2c98717cd7f264973e1c2e2e206abef471c.  These references were
erroneously added in commit e4f862733adf9a5ed75dc3065a584a83de1797b8.
Bug 994419
Bug 997848 - Inherited capabilities not in REST API

With the changes to use CapabilityProxy, the default API serialization (Rails) was serializing the user's underlying attribute from Mongoid, not the proxy overlay of inherited capabilities.  Changed to use serializable_hash which uses the proper values
Merge pull request #3327 from Miciah/oo-diagnostics-add-test_node_containerization_plugin

Merged by openshift-bot
Merge pull request #3378 from Miciah/delete-references-to-obsolete-MONGO_REPLICA_SETS

Merged by openshift-bot
Aliases are writing too many flashes when errors are present
Merge pull request #3418 from lnader/master

Merged by openshift-bot
Merge pull request #3435 from smarterclayton/bug_997848_capabilities_not_shown_via_api

Merged by openshift-bot
Review comments
Automatic commit of package [openshift-origin-cartridge-jbossews] release [0.8.4-1].
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Automatic commit of package [openshift-origin-cartridge-haproxy] release [0.8.5-1].
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