Deprecate support for Neutron FWaaS

... because the Neutron FWaaS project was already retired.

Change-Id: I678fa793ed1c325e7f1f4df25cd6ad9fd384f2a9

ceilometer/network/services/fwaas.py

@@ -13,6 +13,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import warnings
+
 from oslo_log import log
 
 from ceilometer.i18n import _
@@ -32,6 +34,13 @@ class FirewallPollster(base.BaseServicesPollster):
               'firewall_policy_id',
               ]
 
+    def __init__(self, conf):
+        super(FirewallPollster, self).__init__(conf)
+
+        warnings.warn('Support for Neutron FWaaS has been deprecated '
+                      'and will be removed in a future release.',
+                      category=DeprecationWarning, stacklevel=3)
+
     @property
     def default_discovery(self):
         return 'fw_services'
@@ -72,6 +81,13 @@ class FirewallPolicyPollster(base.BaseServicesPollster):
               'audited',
               ]
 
+    def __init__(self, conf):
+        super(FirewallPolicyPollster, self).__init__(conf)
+
+        warnings.warn('Support for Neutron FWaaS has been deprecated '
+                      'and will be removed in a future release.',
+                      category=DeprecationWarning, stacklevel=3)
+
     @property
     def default_discovery(self):
         return 'fw_policy'

releasenotes/notes/deprecate-neutron-fwaas-e985afe956240c08.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Support for Neutron FWaaS has been officially deprecated. The feature has
+    been useless since the Neutron FWaaS project was retired.