Add enable_tempest option

This patch adds an option to disable the installation of Tempest
packages in each undercloud. Users may or may not want
to run Tempest from their undercloud... not installing it
saves us network bandwidth and CI time upstream as well
(where we don't even have the extra time to execute Tempest
at this point currently anyway).

Change-Id: If18b3d333bdbdc20390cb8d952e8c6182218cc1d

elements/puppet-stack-config/install.d/02-puppet-stack-config

@@ -54,7 +54,7 @@ context = {
     'UNDERCLOUD_TUSKAR_PASSWORD': os.environ.get('UNDERCLOUD_TUSKAR_PASSWORD', 'unset'),
     'UNDERCLOUD_DEBUG': os.environ.get('UNDERCLOUD_DEBUG', 'true'),
     'ENABLE_TUSKAR': os.environ.get('ENABLE_TUSKAR', 'true'),
-
+    'ENABLE_TEMPEST': os.environ.get('ENABLE_TEMPEST', 'true'),
     'KEYSTONE_SIGNING_CERTIFICATE':
         open(os.path.join(keystone_pki_dir, 'signing_cert.pem')).read(),
     'KEYSTONE_SIGNING_KEY':

elements/puppet-stack-config/puppet-stack-config.pp

@@ -382,8 +382,10 @@ if str2bool(hiera('enable_tuskar', 'true')) {
   }
 }
 
-# tempest
-# TODO: when puppet-tempest supports install by package, do that instead
-package{'openstack-tempest': }
-# needed for /bin/subunit-2to1 (called by run_tempest.sh)
-package{'subunit-filters': }
+if str2bool(hiera('enable_tempest', 'true')) {
+  # tempest
+  # TODO: when puppet-tempest supports install by package, do that instead
+  package{'openstack-tempest': }
+  # needed for /bin/subunit-2to1 (called by run_tempest.sh)
+  package{'subunit-filters': }
+}

elements/puppet-stack-config/puppet-stack-config.yaml.template

@@ -214,3 +214,4 @@ swift::proxy::authtoken::admin_tenant_name: 'service'
 
 # Options
 enable_tuskar: {{ENABLE_TUSKAR}}
+enable_tempest: {{ENABLE_TEMPEST}}

instack_undercloud/undercloud.py

@@ -150,6 +150,10 @@ _opts = [
                 default=True,
                 help=('Whether to install Tuskar services in the Undercloud.')
                 ),
+    cfg.BoolOpt('enable_tempest',
+                default=True,
+                help=('Whether to install Tempest in the Undercloud.')
+                ),
 ]
 
 # Passwords, tokens, hashes

undercloud.conf.sample

@@ -62,6 +62,10 @@
 # (boolean value)
 #enable_tuskar = true
 
+# Whether to install Tempest packages in the Undercloud.
+# (boolean value)
+#enable_tempest = true
+
 [auth]
 
 #