Add FIPS check job

Testing a new FIPS enabled gate job here.  This job will be
for Centos 8 with FIPS enabled.  This will use a playbook in
the zuul-jobs repo to enable FIPS.

Depends-On: https://review.opendev.org/c/zuul/zuul-jobs/+/788778
Change-Id: I3187971a14b38c7ca3bb64bdd3d18c64709c466f

.zuul.yaml

@@ -32,6 +32,14 @@
         TEMPEST_PLUGINS: '/opt/stack/keystone-tempest-plugin'
         USE_PYTHON3: True
 
+- job:
+    name: keystone-dsvm-py3-functional-fips
+    parent: keystone-dsvm-py3-functional
+    nodeset: devstack-single-node-centos-8-stream
+    description: |
+      Functional testing for a FIPS enabled Centos 8 system
+    pre-run: playbooks/enable-fips.yaml
+
 - job:
     name: keystone-dsvm-functional-federation-opensuse15
     parent: keystone-dsvm-functional
@@ -212,6 +220,9 @@
               - ^etc/.*$
               - ^keystone/tests/unit/.*$
               - ^releasenotes/.*$
+        - keystone-dsvm-py3-functional-fips:
+            voting: false
+            irrelevant-files: *irrelevant-files
         - keystone-dsvm-py3-functional-federation-ubuntu-focal:
             voting: false
             irrelevant-files: *irrelevant-files

playbooks/enable-fips.yaml

@@ -0,0 +1,4 @@
+- hosts: all
+  tasks:
+    - include_role:
+        name: enable-fips