Wherever we reference apache user add httpd package requirement

This may be implicitly defined in many of the cases, but we'll go ahead
and make the requirement on httpd package explicit wherever we set
owner or group to 'apache'.

Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1158271
Merge pull request #317 from sdodson/enterprise-2.2-merge

Wherever we reference apache user add httpd package requirement