packaging: setup: Allow separate hosts for dwh/reports

Moved relevant plugins to common.

Fixed a few dependencies of common plugins on engine.

Made JBoss (which was already in the common plugin) optional.

Enable apache configuration only if engine is enabled.

Change-Id: Idbcf1ae9e442d9ab3ab11a8fd68bde4ebc69cdad
Bug-Url: https://bugzilla.redhat.com/1080997
Bug-Url: https://bugzilla.redhat.com/1080998
Signed-off-by: Yedidyah Bar David <didi@redhat.com>
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>
Signed-off-by: Simone Tiraboschi <stirabos@redhat.com>