Drop Foreman from Apache group on upgrade

This removes a dependency cycle caused by prior installations.

hooks/pre/15-check-disk.rb

@@ -13,7 +13,7 @@
       $stderr.puts DISK_SIZE
       kafo.class.exit 1
     end
-  rescue
+  rescue Exception => e
     $stderr.puts 'Failed to verify available disk space'
   end
 end

hooks/pre/30-upgrade.rb

@@ -163,6 +163,10 @@ def upgrade_qpid_paths
   end
 end
 
+def drop_apache_foreman_group
+  Kafo::Helpers.execute("gpasswd -d apache foreman")
+end
+
 def upgrade_step(step, options = {})
   noop = app_value(:noop) ? ' (noop)' : ''
   long_running = options[:long_running] ? ' (this may take a while) ' : ''
@@ -228,5 +232,7 @@ def fail_and_exit(message)
     upgrade_step :remove_legacy_mongo
   end
 
+  upgrade_step :drop_apache_foreman_group
+
   Kafo::Helpers.log_and_say :info, 'Upgrade Step: Running installer...'
 end