[nova] Transition Stein to EM

This transition the stein branch to extended maintenance.
Changes for bugfixes and things the team deems important are
still encouraged, but there will no longer be official releases
off of the branch.

Please +1 if the team is ready for us to proceed with this
transition, or -1 if there are any final backports currently in
flight that we should wait for. For the latter case, please
update the patch with the new commit hash after doing a final
release to get those changes out so we know to proceed with the
transition.

Change-Id: I198ec2e6dd87abc51864c92eecddd32aca6a63bc

deliverables/stein/nova.yaml

@@ -76,6 +76,10 @@ releases:
     projects:
       - repo: openstack/nova
         hash: cde42879a497cd2b91f0cf926e0417fda07b3c31
+  - version: stein-em
+    projects:
+      - repo: openstack/nova
+        hash: cde42879a497cd2b91f0cf926e0417fda07b3c31
 branches:
   - location: 19.0.0.0rc1
     name: stable/stein

deliverables/stein/os-traits.yaml

@@ -15,6 +15,10 @@ releases:
       - hash: 7f43b7e9a91ef56d3442a67a9f6a169779bbffe6
         repo: openstack/os-traits
     version: 0.11.0
+  - version: stein-em
+    projects:
+      - repo: openstack/os-traits
+        hash: 7f43b7e9a91ef56d3442a67a9f6a169779bbffe6
 branches:
   - location: 0.11.0
     name: stable/stein

deliverables/stein/os-vif.yaml

@@ -37,6 +37,10 @@ releases:
       - hash: ec9d5430300c908ea9a1c64151eee7af522a44e7
         repo: openstack/os-vif
         tarball-base: os_vif
+  - version: stein-em
+    projects:
+      - repo: openstack/os-vif
+        hash: ec9d5430300c908ea9a1c64151eee7af522a44e7
 branches:
   - location: 1.15.1
     name: stable/stein

deliverables/stein/osc-placement.yaml

@@ -15,6 +15,10 @@ releases:
       - hash: 53b32590ad9de5aa74a60960b804493837b9a713
         repo: openstack/osc-placement
     version: 1.5.0
+  - version: stein-em
+    projects:
+      - repo: openstack/osc-placement
+        hash: 53b32590ad9de5aa74a60960b804493837b9a713
 branches:
   - location: 1.5.0
     name: stable/stein

deliverables/stein/python-novaclient.yaml

@@ -27,6 +27,10 @@ releases:
       - hash: c7e793c22e72d4d426a6d10e9c2cfa426fedd365
         repo: openstack/python-novaclient
     version: 13.0.2
+  - version: stein-em
+    projects:
+      - repo: openstack/python-novaclient
+        hash: c7e793c22e72d4d426a6d10e9c2cfa426fedd365
 branches:
   - location: 13.0.0
     name: stable/stein