Disable build of Gnocchi containers

Revert this commit when [1] is solved.

1. gnocchixyz/gnocchi#1304

Change-Id: Iafeb9093340621d65a9c9cd126d65679d981dfb1
Signed-off-by: Maksim Malchuk <maksim.malchuk@gmail.com>
(cherry picked from commit 44e0496)

Author: mmalchuk

kolla/image/build.py

@@ -90,6 +90,7 @@ class Status(Enum):
         "blazar-base",
         "cyborg-base",
         "freezer-base",
+        "gnocchi-base",  # https://github.com/gnocchixyz/gnocchi/issues/1304
         "kuryr-base",
         "monasca-base",
         "monasca-thresh",
@@ -98,6 +99,10 @@ class Status(Enum):
         "zun-base",
     },
 
+    'source': {
+        "gnocchi-base",  # https://github.com/gnocchixyz/gnocchi/issues/1304
+    },
+
     'centos': {
         "hacluster-pcs",         # Missing crmsh package
         "nova-spicehtml5proxy",  # Missing spicehtml5 package