Fix inconsistent deployment architecture switch

Only scenario 004 used 'Ubuntu or not' while the other scenarios use
'Debian family or not'.

Conflicts:
	fixtures/scenario004.pp

Change-Id: I6f9d1181c9e51ea97129f12ee36bbfa9f0cde189
(cherry picked from commit 37195f63e4)
(cherry picked from commit 790dc6ac6f)

fixtures/scenario004.pp

@@ -20,19 +20,23 @@ if $facts['os']['name'] == 'Ubuntu' {
   $ssl = true
 }
 
-if $facts['os']['name'] == 'Ubuntu' {
+case $facts['os']['family'] {
+  'Debian': {
     $ipv6 = false
-  # TODO(tobias-urdin): No service plugin 'BGPVPN'
+    # TODO(tkajinam): Need additional work to load the plugins
     $bgpvpn_enabled = false
-  # TODO(tobias-urdin): Plugin 'networking_l2gw.services.l2gateway.plugin.L2GatewayPlugin' not found.
     $l2gw_enabled = false
-  # FIXME(ykarel) Disable bgp_dragent until Ubuntu python3 stein(with stein packages) jobs are ready
     $bgp_dragent_enabled = false
-} else {
+  }
+  'RedHat': {
     $ipv6 = true
     $bgpvpn_enabled = true
     $l2gw_enabled = true
     $bgp_dragent_enabled = true
+  }
+  default: {
+    fail("Unsupported osfamily (${facts['os']['family']})")
+  }
 }
 
 include openstack_integration