do not enable the "Run Puppet" button

since the button doesn't work without the extra workaround
described in:
https://bugzilla.redhat.com/show_bug.cgi?id=959599
http://projects.theforeman.org/issues/1830
Merge pull request #17 from cwolferh/no_run_puppet_button

do not enable the "Run Puppet" button :-(