Add array-comma-string for better parsing attributes

This is fix for bnc#903674
Crowbar and/or nova cannot cope with vCenter cluster names containing spaces
https://bugzilla.suse.com/show_bug.cgi?id=903674
Avoid temporary service outage with error 503

Two changes to the the ports.conf template cause two delayed apache2 reloads
that happen almost simultanously. A resulting race condition with the creation
of the unix socket used by mod_wsgi is the origin of a temporary 503 service
not available error when accessing the nova dashboard shortly after a chef-client
run. Decoupling the two reload commands prevents this.

See also https://bugzilla.novell.com/show_bug.cgi?id=897996