correct typo of depricated to deprecated

https://bugzilla.redhat.com/show_bug.cgi?id=1079295
Add mms-agent to gear with old settings.py, check the warning message,
typo in it.

The settings.py was depricated, please check your 10gen-mms-agent
cartridge documentation at
http://openshift.github.io/documentation/oo_cartridge_guide.html#10gen-mms-agent
Merge pull request #5027 from bparees/mms_typo

Merged by openshift-bot
Fixing extended tests