Python cartridge suddenly stopped installing dependencies

https://bugzilla.redhat.com/show_bug.cgi?id=1085783

When i push to my Python cartridge, it fails to install dependencies
from setup.py.

Need to add libyaml-devel dependency so python dependencies can build.
Add test for elevating and lowering the explicit role of a member who also has an implicit grant
10gen-mms-agent version bump, due to the failed migration
haproxy_ctld.log not tidy after run the command rhc tidy-app app_name

https://bugzilla.redhat.com/show_bug.cgi?id=1086649

The log haproxy_ctld.log in app-root/logs is not tidied after run the
command "rhc tidy-app scalable_app_name"
Bug 1070173 - Add '-v' option for oo-admin-ctl-tc to turn verbose output
Automatic commit of package [rubygem-openshift-origin-node] release [1.23.3-1].
Automatic commit of package [rubygem-openshift-origin-auth-remote-user] release [1.19.3-1].
Automatic commit of package [openshift-origin-cartridge-haproxy] release [1.23.2-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.23.3-1].
Automatic commit of package [rubygem-openshift-origin-common] release [1.22.3-1].
Automatic commit of package [openshift-origin-cartridge-perl] release [1.22.2-1].
Automatic commit of package [openshift-origin-broker-util] release [1.23.2-1].
Merge pull request #5235 from jhadvig/10gen_version_bump

Merged by openshift-bot
Merge pull request #5221 from bparees/python_yaml

Merged by openshift-bot
Merge pull request #5229 from liggitt/bug_1086115_change_explicit_role

Merged by openshift-bot
Merge pull request #5236 from bparees/haproxy_tidy

Merged by openshift-bot
Merge pull request #5231 from mfojtik/bugzilla/1070173

Merged by openshift-bot
Don't show backtrace when metrics script times out

Rescue Exception instead of default StandardError when running cartridge
and application metrics scripts because the timeout exception generated
by oo_spawn (ShellExecutionException) currently extends Exception, so
rescue => e won't catch these errors.

Write errors to stdout instead of stderr so they can be displayed in the
logs.

This commit fixes bug 1086549.
DNS may have been stored as mixed case, but should always be used downcased
Check haproxyctld pid when trying to stop it

Check the haproxy_ctld pidfile during stop rather than relying on
isrunning, which checks haproxy's pidfile; otherwise, haproxy_ctld
will never be signalled.