Fix image name in s2i usage message
Fix image name in s2i usage message

sclorg/s2i-ruby-container,openshift/sti-ruby,bparees/sti-ruby,getupcloud/sti-ruby,mfojtik/sti-ruby,hhorak/sti-ruby,sclorg/s2i-ruby-container,hhorak/sti-ruby,getupcloud/sti-ruby,bparees/sti-ruby,getupcloud/sti-ruby,csrwng/sti-ruby,openshift/sti-ruby,csrwng/sti-ruby,sclorg/s2i-ruby-container,mfojtik/sti-ruby