Pin swift to last good hash

After https://review.openstack.org/#/c/500158 jobs are
failing, so set it to last known good hash.

Change-Id: I2c3a690d69b87eb9ed70fa3ab6e02d48c3e67b30

rdo.yml

@@ -1627,6 +1627,15 @@ packages:
     cloud7-openstack-pike-release: python-glance-store-0.22.0-1.el7
 - project: swift
   conf: rpmfactory-core
+  tags:
+    # Fixme(ykarel) once the issue introduced in
+    # https://review.openstack.org/#/c/500158 is fixed
+    queens-uc:
+      source-branch: 449d83fb0c8668f444baf3c74cf15c26a70bb02e
+    queens:
+    pike:
+    ocata:
+    newton:
   maintainers:
   - zaitcev@redhat.com
   buildsys-tags: