Pass hieradata relevant for httpd in the Heat APIs

Pass hieradata relevant for httpd in the Heat APIs

The patch this depends on passes through the classes some parameters
that are meant to be passed via t-h-t. This patch addresses these and
other things required for deploying these services over httpd:

* Set the number of workers taking care not to set this value to 0.
* Add the apache base hieradata to the service profiles.
* Set the servernames and other httpd-specific values.

bp tls-via-certmonger

Change-Id: I88e5ea7b9bbf35ae03f84fdc3ec76ae09f11a1b6
Depends-On: I23971b0164468e67c9b3577772af84bd947e16f1