Add repository for oslo.metrics

Following [1], initial code for oslo.metrics should soon be proposed.
Let's create a repository in OpenDev to host that code.

[1] https://specs.openstack.org/openstack/oslo-specs/specs/ussuri/oslo-metrics.html

Needed-By: I454700e72ba8c9a7a59e69c97011884ea5b7ae15
Change-Id: I5b12f0343cbb9348e75f090ae59115035970372c

gerrit/acls/openstack/oslo.metrics.config

@@ -0,0 +1,16 @@
+[access "refs/heads/*"]
+abandon = group oslo-metrics-core
+label-Code-Review = -2..+2 group oslo-metrics-core
+label-Workflow = -1..+1 group oslo-metrics-core
+
+[access "refs/heads/stable/*"]
+abandon = group stable-maint-core
+label-Code-Review = -2..+2 group stable-maint-core
+label-Workflow = -1..+1 group stable-maint-core
+
+[receive]
+requireChangeId = true
+requireContributorAgreement = true
+
+[submit]
+mergeContent = true

gerrit/projects.yaml

@@ -4340,6 +4340,8 @@
   description: OpenStack library for messaging
   options:
     - translate
+- project: openstack/oslo.metrics
+  description: OpenStack library for collecting metrics from Oslo libraries
 - project: openstack/oslo.middleware
   description: OpenStack middleware library
   docimpact-group: openstack-api-site

zuul/main.yaml

@@ -758,6 +758,7 @@
           - openstack/oslo.limit
           - openstack/oslo.log
           - openstack/oslo.messaging
+          - openstack/oslo.metrics
           - openstack/oslo.middleware
           - openstack/oslo.policy
           - openstack/oslo.privsep