[openstack] add endpoint_type parameter to examples (#41979)

Certain project functions are not available on the openstack public api. Creating and deleting projects are examples where you must use the admin api.

In most devstack or simple openstack deployments the public, internal and admin apis may live at the IP. However in most production deployments the admin APIs are on a separate network than the public APIs. Therefore for these examples to consistently work, we must specify the admin endpoint_type.

lib/ansible/modules/cloud/openstack/os_project.py

@@ -58,6 +58,7 @@ EXAMPLES = '''
 # Create a project
 - os_project:
     cloud: mycloud
+    endpoint_type: admin
     state: present
     name: demoproject
     description: demodescription
@@ -67,6 +68,7 @@ EXAMPLES = '''
 # Delete a project
 - os_project:
     cloud: mycloud
+    endpoint_type: admin
     state: absent
     name: demoproject
 '''