Allow customization of db sync command line

Add $extra_params parameter to keystone::db::sync class to allow
end-users to add command line parameters to the db_sync command.

Change-Id: I3965a4d0d4974e7ee925c99207d4d6d4510a517f
Closes-bug: 1472740

manifests/db/sync.pp

@@ -1,8 +1,20 @@
 #
 # Class to execute "keystone-manage db_sync
 #
-class keystone::db::sync {
+# == Parameters
+#
+# [*extra_params*]
+#   (optional) String of extra command line parameters to append
+#   to the keystone-manage db_sync command.  These will be
+#   inserted in the command line between 'keystone-manage' and
+#   'db_sync' in the command line.
+#   Defaults to ''
+#
+class keystone::db::sync(
+  $extra_params  = undef,
+) {
   exec { 'keystone-manage db_sync':
+    command     => "keystone-manage ${extra_params} db_sync",
     path        => '/usr/bin',
     user        => 'keystone',
     refreshonly => true,

spec/classes/keystone_db_sync_spec.rb

@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+describe 'keystone::db::sync' do
+
+  describe 'with only required params' do
+    it {
+        is_expected.to contain_exec('keystone-manage db_sync').with(
+          :command     => 'keystone-manage  db_sync',
+          :user        => 'keystone',
+          :refreshonly => true,
+          :subscribe   => ['Package[keystone]', 'Keystone_config[database/connection]'],
+          :require     => 'User[keystone]'
+        )
+    }
+  end
+
+  describe "overriding extra_params" do
+    let :params do
+      {
+        :extra_params => '--config-file /etc/keystone/keystone.conf',
+      }
+    end
+
+    it {
+        is_expected.to contain_exec('keystone-manage db_sync').with(
+          :command     => 'keystone-manage --config-file /etc/keystone/keystone.conf db_sync',
+          :user        => 'keystone',
+          :refreshonly => true,
+          :subscribe   => ['Package[keystone]', 'Keystone_config[database/connection]'],
+          :require     => 'User[keystone]'
+        )
+    }
+  end
+
+end

spec/classes/keystone_spec.rb

@@ -136,6 +136,7 @@ describe 'keystone' do
     it 'should synchronize the db if $sync_db is true' do
       if param_hash['sync_db']
         is_expected.to contain_exec('keystone-manage db_sync').with(
+          :command     => 'keystone-manage  db_sync',
           :user        => 'keystone',
           :refreshonly => true,
           :subscribe   => ['Package[keystone]', 'Keystone_config[database/connection]'],