Python SDK make functional tests a non voting gate

Change-Id: I0b194721f7ea024a84fb2c895b1071761f7f5f88

zuul/layout.yaml

@@ -1255,6 +1255,9 @@ jobs:
   - name: gate-networking-ofagent-python27
     voting: false
 
+  - name: check-sdk-dsvm-functional
+    voting: false
+
   # NOTE(jroll): This job was not working at Juno release.
   - name: ^(gate|check)-tempest-dsvm-ironic-agent_ssh$
     branch: ^(?!stable/(icehouse|juno)).*$
@@ -6919,7 +6922,7 @@ projects:
       - name: check-requirements
       - name: pypy-jobs
       - name: publish-to-pypi
-    experimental:
+    check:
       - check-sdk-dsvm-functional
     post:
       - python-openstacksdk-coverage