install-chef-suse: Remove barclamps dir after uninstalling barclamps

Since uninstalling barclamps should remove the yml files from there,
let the uninstall process work.
Don't clear terminal in case of error (i.e. when using '-v')
Merge pull request #1857 from saschpe/master-installchefsuse-noclear

Don't clear terminal in case of error (i.e. when using '-v')
Merge pull request #1856 from vuntz/install-chef-suse-fix

install-chef-suse: Remove barclamps dir after uninstalling barclamps
change test gem cache to 1.9
remove nagios and ganglia from trunk for now