cart => cartridge

Since this is output to the user, it should be consistant, for clarity's
sake. In other cartridges and in other methods, output specifies
"cartridge" instead of "cart".
Bug 1151494 - Add WSGIApplicationGroup directive to wsgi.conf
Merge pull request #5879 from mfojtik/python_nltk

Merged by openshift-bot
Merge pull request #5876 from jphager2/cart

Merged by openshift-bot
Use /usr/bin/ruby to determine the system ruby version instead of rpm