Drop spurious yard dependency from common pkg

Drop the BuildRequires: for rubygem-yard from
rubygem-openshift-origin-common.spec, and drop .yardoc (which doesn't
exist) from %install and %files.
Merge pull request #3494 from danmcp/master

Merged by openshift-bot
Bug 988662 - Add --help to list of arguments for oo-env-var-* commands
Make dependency on 0.0.1 version of mock explicit for upgrade tests
Bug 1000727 - HAProxy using CLIENT_MESSAGE for status messages
Merge pull request #3104 from Miciah/rubygem-openshift-origin-common-drop-rubygem-yard-dependency

Merged by openshift-bot
Merge pull request #3497 from mfojtik/bugzilla/988662

Merged by openshift-bot
Merge pull request #3485 from pmorie/dev/upgrades

Merged by openshift-bot
Merge pull request #3499 from jwhonce/bug/1000727

Merged by openshift-bot