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.
Merge pull request #5239 from ncdc/bug/1086549

Merged by openshift-bot