Allow setting reseller_prefix for keystone filter

When using keystone, it's possible to modify the behaviour to
use a different prefix instead of the default AUTH_.

This patch allows you to be able to set that option when
declaring your class definition.

Change-Id: I11ff23d118e0f3d1792b43e1dc7a2c82c6826427

manifests/proxy/keystone.pp

@@ -19,7 +19,8 @@
 
 class swift::proxy::keystone(
   $operator_roles      = ['admin', 'SwiftOperator'],
-  $is_admin            = true
+  $is_admin            = true,
+  $reseller_prefix     = 'AUTH_'
 ) {
 
   concat::fragment { 'swift_keystone':

spec/classes/swift_proxy_keystone_spec.rb

@@ -27,6 +27,7 @@ describe 'swift::proxy::keystone' do
 
     it { should contain_file(fragment_file).with_content(/operator_roles = admin, SwiftOperator/) }
     it { should contain_file(fragment_file).with_content(/is_admin = true/) }
+    it { should contain_file(fragment_file).with_content(/reseller_prefix = AUTH_/) }
 
   end
 
@@ -34,12 +35,14 @@ describe 'swift::proxy::keystone' do
 
     let :params do
       {
-        :operator_roles => 'foo',
+        :operator_roles  => 'foo',
-        :is_admin       => 'false',
+        :is_admin        => 'false',
+        :reseller_prefix => 'SWIFT_'
       }
 
       it { should contain_file(fragment_file).with_content(/operator_roles = foo/) }
       it { should contain_file(fragment_file).with_content(/is_admin = false/) }
+      it { should contain_file(fragment_file).with_content(/reseller_prefix = SWIFT_/) }
 
     end
 

templates/proxy/keystone.conf.erb

@@ -3,3 +3,4 @@
 use = egg:swift#keystoneauth
 operator_roles = <%= @operator_roles.to_a.join(', ') %>
 is_admin = <%= @is_admin %>
+reseller_prefix = <%= @reseller_prefix %>