Chef 16 updates

Depends-On: https://review.opendev.org/747752
Depends-On: https://review.opendev.org/747557
Change-Id: I986de1516de71ff578cb8c9e70f8afb49c0347e9
Signed-off-by: Lance Albertson <lance@osuosl.org>

README.rst

@@ -21,7 +21,7 @@ Requirements
 ============
 
 - Chef 15 or higher
-- Chef Workstation 0.18.3 for testing (also includes Berkshelf for
+- Chef Workstation 20.8.111 for testing (also includes Berkshelf for
   cookbook dependency resolution)
 
 Cookbooks

recipes/setup.rb

@@ -18,8 +18,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-require 'uri'
-
 class Chef::Recipe
   include ::Openstack
 end
@@ -37,7 +35,7 @@ package platform_options['tempest_packages'] do
 end
 
 identity_endpoint = internal_endpoint 'identity'
-auth_url = ::URI.decode identity_endpoint.to_s
+auth_url = identity_endpoint.to_s
 
 admin_user = node['openstack']['identity']['admin_user']
 admin_pass = get_password 'user', admin_user