Skip building wheels for release jobs

Change-Id: I94224863b67a2ff264594dec1b958c29bef08425

.zuul.yaml

@@ -3,6 +3,9 @@
       - openstack-python-jobs
     check:
       jobs:
+        - test-release-openstack:
+            vars:
+              build_wheel: false
         - openstack-tox-py35
         - openstack-tox-py36
         - openstack-tox-py37
@@ -15,6 +18,9 @@
         - libec-pyeclib-unit-centos-8
     gate:
       jobs:
+        - test-release-openstack:
+            vars:
+              build_wheel: false
         - openstack-tox-py35
         - openstack-tox-py36
         - openstack-tox-py37
@@ -25,6 +31,16 @@
         - libec-pyeclib-unit
         - libec-pyeclib-unit-centos-7
         - libec-pyeclib-unit-centos-8
+    pre-release:
+      jobs:
+        - release-openstack-python:
+            vars:
+              build_wheel: false
+    release:
+      jobs:
+        - release-openstack-python:
+            vars:
+              build_wheel: false
 
 - job:
     name: pyeclib-tox-py27-centos-7