Make murano-dsvm jobs voting

This job is running for about two months and has proved to be stable enough
to be marked as voting. Also adding this job to the gate pipeline for
Murano projects.

Change-Id: I9acf4258b8e7415e94d76920f5aa9682fa76f25d

modules/openstack_project/files/zuul/layout.yaml

@@ -577,8 +577,6 @@ jobs:
     voting: false
   - name: gate-murano-dashboard-requirements
     voting: false
-  - name: gate-murano-devstack-dsvm
-    voting: false
   - name: gate-oslo.vmware-docs
     voting: false
   - name: gate-oslo.vmware-requirements
@@ -3574,6 +3572,8 @@ projects:
     check:
       - gate-murano-requirements
       - gate-murano-devstack-dsvm
+    gate:
+      - gate-murano-devstack-dsvm
     post:
       - murano-branch-tarball
 
@@ -3600,6 +3600,7 @@ projects:
       - gate-murano-dashboard-pep8
       - gate-murano-dashboard-python26
       - gate-murano-dashboard-python27
+      - gate-murano-devstack-dsvm
     post:
       - murano-dashboard-branch-tarball
     pre-release:
@@ -4150,6 +4151,7 @@ projects:
       - gate-python-muranoclient-pep8
       - gate-python-muranoclient-python26
       - gate-python-muranoclient-python27
+      - gate-murano-devstack-dsvm
     post:
       - python-muranoclient-branch-tarball