require that shorewall has been installed before execs are run (#3339)

Change-Id: Iae2b1cacd64565931cef77194a733aeae681efaf
require that shorewall has been installed before execs are run (#3339)

Change-Id: Iae2b1cacd64565931cef77194a733aeae681efaf
Merge branch 'bug/3339' into develop

Conflicts:
	puppet/modules/site_config/manifests/initial_firewall.pp

Change-Id: I794d057dc5d89133e552dd12939e8b9792cf1611