apache: Add support for RequestHeader statements

This change introduces the new parameter to override
the apache::vhost::request_headers parameter, which is used to define
RequestHeader statements in vhost configuration.

Change-Id: I360b18acdf974bf3cdc9f8e817b66cd85f116afd

manifests/wsgi/apache.pp

@@ -166,6 +166,10 @@
 #   (Optional) Headers for the vhost.
 #   Defaults to undef
 #
+# [*request_headers*]
+#   (Optional) Modifies collected request headers in various ways.
+#   Defaults to undef
+#
 # [*aliases*]
 #   (Optional) Aliases for the vhost.
 #   Defaults to undef
@@ -262,6 +266,7 @@ define openstacklib::wsgi::apache (
   $wsgi_import_script          = undef,
   $wsgi_import_script_options  = undef,
   $headers                     = undef,
+  $request_headers             = undef,
   $aliases                     = undef,
   $custom_wsgi_process_options = {},
   $custom_wsgi_script_aliases  = undef,
@@ -373,6 +378,7 @@ define openstacklib::wsgi::apache (
     wsgi_import_script         => $wsgi_import_script_real,
     wsgi_import_script_options => $wsgi_import_script_options_real,
     headers                    => $headers,
+    request_headers            => $request_headers,
     aliases                    => $aliases,
     custom_fragment            => $vhost_custom_fragment,
     allow_encoded_slashes      => $allow_encoded_slashes,

releasenotes/notes/apache-request_headers-1db72ccfd1e76735.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The new ``openstacklib::wsgi::apache::request_headers`` parameter has been
+    added.

spec/defines/openstacklib_wsgi_apache_spec.rb

@@ -90,6 +90,7 @@ describe 'openstacklib::wsgi::apache' do
         :wsgi_script_aliases         => { '/' => "/var/www/cgi-bin/keystone/main" },
         :wsgi_application_group      => '%{GLOBAL}',
         :headers                     => nil,
+        :request_headers             => nil,
         :aliases                     => nil,
         :setenvif                    => ['X-Forwarded-Proto https HTTPS=1'],
         :access_log_file             => false,
@@ -115,6 +116,7 @@ describe 'openstacklib::wsgi::apache' do
           :wsgi_chunked_request       => 'On',
           :custom_wsgi_script_aliases => { '/admin' => '/var/www/cgi-bin/keystone/admin' },
           :headers                    => 'set X-Frame-Options "DENY"',
+          :request_headers            => 'set Content-Type "application/json"',
           :aliases                    => [
             { 'alias' => '/robots.txt', 'path' => '/etc/keystone/robots.txt', },
           ],
@@ -160,6 +162,7 @@ describe 'openstacklib::wsgi::apache' do
         :wsgi_pass_authorization     => 'On',
         :wsgi_chunked_request        => 'On',
         :headers                     => 'set X-Frame-Options "DENY"',
+        :request_headers             => 'set Content-Type "application/json"',
         :aliases                    => [
           { 'alias' => '/robots.txt', 'path' => '/etc/keystone/robots.txt', }
         ],