Don't create Member role

Creating the "_member_" role and "Member" role creates confusion.
"_member_" has special significance to keystone, so we keep that.

Horizon is modified to use "_member_" as the default role in [1].
This change should be merged after that.

See also rhbz#984294 [2]

[1] https://review.openstack.org/#/c/60462/
[2] https://bugzilla.redhat.com/show_bug.cgi?id=984294

Change-Id: If4ed1c2c72ca67acad7b70651e68ff7ce68157dd
(cherry picked from commit 1dd4297243)

manifests/roles/admin.pp

@@ -6,7 +6,7 @@
 #   * "admin" tenant (defaults to "openstack")
 #   * admin user (that defaults to the "admin" tenant)
 #   * admin role
-#   * Member role
+#   * _member_ role
 #   * adds admin role to admin user on the "admin" tenant
 #
 # [*Parameters*]
@@ -51,7 +51,7 @@ class keystone::roles::admin(
     email       => $email,
     password    => $password,
   }
-  keystone_role { ['admin', 'Member', '_member_']:
+  keystone_role { ['admin', '_member_']:
     ensure => present,
   }
   keystone_user_role { "${admin}@${admin_tenant}":

spec/classes/keystone_roles_admin_spec.rb

@@ -28,7 +28,7 @@ describe 'keystone::roles::admin' do
       :email       => 'foo@bar',
       :password    => 'ChangeMe'
     )}
-    ['admin', 'Member', '_member_'].each do |role_name|
+    ['admin', '_member_'].each do |role_name|
       it { should contain_keystone_role(role_name).with_ensure('present') }
     end
     it { should contain_keystone_user_role('admin@openstack').with(