Make interop check job as voting

'interop-tempest-consistency' job
has been added to check the test renaming
compatibility with interop usage.

This job was added as n-v to check the stability
and it is running fine since it was added so
making this as voting job in check pipeline.

Change-Id: I088f64d87b04b5db2319ccd3b3d02821a06f35e9
diff --git a/.zuul.yaml b/.zuul.yaml
index 8576455..9546f1d 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -569,7 +569,6 @@
         - tempest-full:
             irrelevant-files: *tempest-irrelevant-files
         - interop-tempest-consistency:
-            voting: false
             irrelevant-files: *tempest-irrelevant-files
         - tempest-full-test-account-py3:
             voting: false