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 99445 - Better error message for No nodes available

https://bugzilla.redhat.com/show_bug.cgi?id=994445

Fix the error message to the user when NodeUnavailableException
is raised.
Add note on creating node target directory
Simplified mkdir procedure
Added 'httpd_restart_action' function to Bash SDK

This function will handle restart/start operation in case when the
HTTPD pid file is corrupted or missing or the HTTPD service is not
running for some reason.

The main purpose of this function is to make sure that HTTPD based
application will restart successfuly when stopped/crashed.
Updated 'restart' operation for all HTTPD based cartridges to use
'httpd_restart_action'
Add PEAR bin dir to the PATH variable

Trello card: https://trello.com/c/J5McYMNq (origin_runtime_169)
Merge pull request #3341 from mfojtik/bugzilla/990417

Merged by openshift-bot
Merge pull request #3386 from nhr/add_note_on_ssh_key_copy

Add note on creating node target directory
Fix for bug 995034
Remove trailing dot from the fqdn if there is one.
Automatic commit of package [rubygem-openshift-origin-node] release [1.13.7-1].
Automatic commit of package [openshift-origin-node-proxy] release [1.11.3-1].
Automatic commit of package [openshift-origin-broker-util] release [1.13.6-1].
Automatic commit of package [openshift-origin-cartridge-ruby] release [0.8.5-1].
Automatic commit of package [openshift-origin-cartridge-php] release [0.8.4-1].
Automatic commit of package [openshift-origin-cartridge-perl] release [0.8.4-1].
Automatic commit of package [openshift-origin-cartridge-python] release [0.8.4-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.13.5-1].