Remove some less necessary check jobs

In order to lighten the infra load, especially in
light of recent persistent backlog, this patch
proposes to remove several less essential jobs.

Removed check jobs:
- congress-devstack-api-postgresql
- congress-pe-replicated-mysql

because all issues should be apparent from the
remaining jobs:
- congress-devstack-api-mysql
- congress-pe-replicated-postgresql

Also temporarily disabling the tripleO jobs until the
quicker single-node jobs are available.

See tripleO announcement for more info:
https://www.mail-archive.com/openstack-dev@lists.openstack.org/msg123863.html

Change-Id: Iaaeffff20d28e550603af4d1059c8ff1662adec7

.zuul.yaml

@@ -133,8 +133,6 @@
       jobs:
         - congress-devstack-api-mysql
         - congress-devstack-py35-api-mysql
-        - congress-devstack-api-postgresql
-        - congress-pe-replicated-mysql
         - congress-pe-replicated-postgresql
         # TripleO jobs that deploy Congress.
         # Note we don't use a project-template here, so it's easier
@@ -144,10 +142,9 @@
         # and beyond.
         # If you need any support to debug these jobs in case of
         # failures, please reach us on #tripleo IRC channel.
-        - tripleo-ci-centos-7-scenario001-multinode-oooq:
-            voting: false
-        - tripleo-ci-centos-7-scenario001-multinode-oooq-container:
-            voting: false
+# temporarily disable tripleO check until faster single-node job is available
+#        - tripleo-ci-centos-7-scenario007-multinode-oooq-container:
+#            voting: false
     gate:
       queue: congress
       jobs: