Fix rspec unit & beaker tests

Problem #1
https://review.openstack.org/#/c/228744/ has been merged, we need to
drop the 'tenant' parameter to Keystone_user resource.

Problem #2
https://review.openstack.org/#/c/228744/ has been merged, we need to
drop the '_member_' role management.

Change-Id: I22313fed2c9f2c07caa6058e615d3872e0cfb861

spec/acceptance/basic_heat_spec.rb

@@ -90,7 +90,7 @@ describe 'basic heat' do
       class { '::keystone::roles::admin':
         email       => 'test@example.tld',
         password    => 'a_big_secret',
-        admin_roles => ['admin', '_member_', 'heat_stack_owner']
+        admin_roles => ['admin', 'heat_stack_owner']
       }
       class { '::keystone::endpoint':
         public_url => "https://${::fqdn}:5000/",

spec/classes/heat_keystone_auth_cfn_spec.rb

@@ -34,7 +34,6 @@ describe 'heat::keystone::auth_cfn' do
           :ensure   => 'present',
           :password => params[:password],
           :email    => params[:email],
-          :tenant   => params[:tenant]
         )
       end
 

spec/classes/heat_keystone_auth_spec.rb

@@ -43,7 +43,6 @@ describe 'heat::keystone::auth' do
           :ensure   => 'present',
           :password => params[:password],
           :email    => params[:email],
-          :tenant   => params[:tenant]
         )
       end