federation: Ensure keyston::wsgi::apache is loaded

... otherwise the reference to keystone::wsgi::apache::priority fails.

Closes-Bug: #2054306
Change-Id: If33a0f50a071157314bbac820ce13dbd79bc9d3e

manifests/federation/mellon.pp

@@ -44,6 +44,10 @@ class keystone::federation::mellon (
   include keystone::deps
   include keystone::params
 
+  if ! defined(Class['keystone::wsgi::apache']) {
+    fail('The keystone::wsgi::apache class should be included in the catalog')
+  }
+
   # Note: if puppet-apache modify these values, this needs to be updated
   if $template_order <= 330 or $template_order >= 999 {
     fail('The template order should be greater than 330 and less than 999.')

manifests/federation/openidc.pp

@@ -163,6 +163,10 @@ class keystone::federation::openidc (
   include keystone::deps
   include keystone::params
 
+  if ! defined(Class['keystone::wsgi::apache']) {
+    fail('The keystone::wsgi::apache class should be included in the catalog')
+  }
+
   if !($openidc_verify_method in ['introspection', 'jwks']) {
     fail('Unsupported token verification method.' +
         '  Must be one of "introspection" or "jwks"')

manifests/federation/shibboleth.pp

@@ -53,6 +53,10 @@ class keystone::federation::shibboleth (
   include apache
   include keystone::deps
 
+  if ! defined(Class['keystone::wsgi::apache']) {
+    fail('The keystone::wsgi::apache class should be included in the catalog')
+  }
+
   # Note: if puppet-apache modify these values, this needs to be updated
   if $template_order <= 330 or $template_order >= 999 {
     fail('The template order should be greater than 330 and less than 999.')