Don't drop unmatched Kolla service logs

Kolla service logs which don't match a Fluentd rewriterule get dropped.
This change prevents that by tagging them with 'unmatched'.

Change-Id: I0a2484d878d5c86977fb232a57c52f874ca7a34c

ansible/roles/common/templates/conf/filter/01-rewrite-0.12.conf.j2

@@ -35,4 +35,5 @@
     rewriterule32 programname ^(blazar-api|blazar-manager)$ openstack_python
     rewriterule33 programname ^(cyborg-api|cyborg-conductor|cyborg-agent)$ openstack_python
     rewriterule34 programname ^(monasca-api|monasca-notification|monasca-persister|agent-collector|agent-forwarder|agent-statsd)$ openstack_python
+    rewriterule35 programname .+ unmatched
 </match>

ansible/roles/common/templates/conf/filter/01-rewrite-0.14.conf.j2

@@ -176,4 +176,9 @@
     pattern ^(monasca-api|monasca-notification|monasca-persister|agent-collector|agent-forwarder|agent-statsd)$
     tag openstack_python
   </rule>
+  <rule>
+    key     programname
+    pattern .+
+    tag unmatched
+  </rule>
 </match>