Add scenario002-standalone to gates as we make it voting

Adds scen2 to the gate jobs as well as check.

Change-Id: Ida84c67ba6426c0498fcc99c39a0857a772728a4

zuul.d/layout.yaml

@@ -168,6 +168,24 @@
               - ^network/endpoints/.*$
               - ^common/.*$
               - zuul.d/*
+        - tripleo-ci-centos-7-scenario002-standalone:
+            files:
+              - ^(docker|puppet)/services/.*aodh.*$
+              - ^(docker|puppet)/services/.*barbican.*$
+              - ^(docker|puppet)/services/.*ceilometer.*$
+              - ^(docker|puppet)/services/.*cinder.*$
+              - ^(docker|puppet)/services/.*ec2-api.*$
+              - ^(docker|puppet)/services/.*glance.*$
+              - ^(docker|puppet)/services/.*gnocchi.*$
+              - ^(docker|puppet)/services/.*panko.*$
+              - ^(docker|puppet)/services/.*swift.*$
+              - ^(docker|puppet)/services/.*zaqar.*$
+              - ci/environments/scenario002-standalone.yaml
+              - ^environments\/.*.yaml
+              - ^deployed-server/.*$
+              - ^network/endpoints/.*$
+              - ^common/.*$
+              - zuul.d/*
         - tripleo-ci-centos-7-scenario004-standalone:
             files:
               - ^docker/services/ceph.*$