Adding a repo template build for "centos","redhat" & "fedora"
	modified:   recipes/default.rb
	new file:   templates/default/jpackage.repo.erb
Tweaking the repo generation to be more generic
renamed the repo file to jetty

Changed this incase there was a jpackage repo already defined.
Fix typo in repo file name
Fix jetty.xml creation

http://tickets.opscode.com/browse/COOK-3419
Merge branch 'COOK-3417'