Release magnum-ui 5.3.0

Includes required UI fixes to use let users
select Fedora CoreOS in cluster templates
and other smaller fixes.

$git log --oneline 5.2.1..origin/stable/train
2fd052e Merge "Add rolling upgrade ui" into stable/train
8bcf1d4 Merge "Add ui for resizing clusters" into stable/train
f6d2fa6 Merge "Imported Translations from Zanata" into stable/train
c3f04c0 Imported Translations from Zanata
b0fdeed Add rolling upgrade ui
d69b47d Add fedora-coreos distro
7bc8797 Add ui for resizing clusters

Change-Id: If99da6e8f4a5de5a65634fe66e18a47dbee494f8

deliverables/train/magnum-ui.yaml

@@ -14,6 +14,10 @@ releases:
     projects:
       - repo: openstack/magnum-ui
         hash: 5763f3b40a44a9b9badb74a8157148a4a255af14
+  - version: 5.3.0
+    projects:
+      - repo: openstack/magnum-ui
+        hash: 2fd052efa8a5a7ec6669c6e13622213fc43f5721
 branches:
   - name: stable/train
     location: 5.2.0