We dont support fwaas in Horizon

By default we are enabling a plugin
not supported by default.

Only in pike, in master is already disabled.

Change-Id: I7dd2d840c4f706799673bb85eb81ede275976d29
Related-Bug: 1742947

docker/services/horizon.yaml

@@ -152,7 +152,6 @@ outputs:
               - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
               # Installed plugins:
               - ENABLE_CLOUDKITTY=yes
-              - ENABLE_FWAAS=yes
               - ENABLE_IRONIC=yes
               - ENABLE_MAGNUM=yes
               - ENABLE_MANILA=yes
@@ -162,6 +161,7 @@ outputs:
               - ENABLE_SAHARA=yes
               - ENABLE_TROVE=yes
               # Not installed:
+              - ENABLE_FWAAS=no
               - ENABLE_FREEZER=no
               - ENABLE_KARBOR=no
               - ENABLE_DESIGNATE=no