[CI] Temporarily set integration test job to non-voting

This failure has been determined to be unrelated to
changes that are currently in-flight. While we
investigate a fix, we can set this job to non-voting
to merge unrelated fixes/improvements in parallel.

Change-Id: I6f4ce5434a6504ca037c867ce7b9b1ea8e852be4
Partial-Bug: #1933137
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>

.zuul.yaml

@@ -11,10 +11,12 @@
       jobs:
         - openstack-tox-cover:
             voting: false
-        - manila-ui-integration-tests
+        - manila-ui-integration-tests:
+            voting: false
     gate:
       jobs:
-        - manila-ui-integration-tests
+        - manila-ui-integration-tests:
+            voting: false
 
 - job:
     name: manila-ui-integration-tests