Remove tenant parameter from keystone_user

Puppet-swift to match recent update in keystone module.
The tenant parameter was made deprecated in Kilo and to be removed in Liberty.
Removing the tenant parmamter from keystone_user in dispersion.pp

Change-Id: Ie86497f462e2a94819b8dbd1e4131890858af266

manifests/keystone/dispersion.pp

@@ -40,7 +40,6 @@ class swift::keystone::dispersion(
     ensure   => present,
     password => $auth_pass,
     email    => $email,
-    tenant   => $tenant,
   }
 
   keystone_user_role { "${auth_user}@${tenant}":

spec/classes/swift_keystone_dispersion_spec.rb

@@ -8,7 +8,6 @@ describe 'swift::keystone::dispersion' do
       :ensure   => 'present',
       :password => 'dispersion_password',
       :email    => 'swift@localhost',
-      :tenant   => 'services'
     ) }
 
     it { is_expected.to contain_keystone_user_role('dispersion@services').with(
@@ -33,7 +32,6 @@ describe 'swift::keystone::dispersion' do
       :ensure   => 'present',
       :password => 'foo',
       :email    => 'bar@example.com',
-      :tenant   => 'dummyTenant'
     ) }
 
     it { is_expected.to contain_keystone_user_role('bar@dummyTenant') }