Add support for SDK auth caching

SDK starts caching authorization state in keyring (when available and
enabled). Respecting it requires few minor changes: closing connection
and reusing auth_ref.

Depends-On: https://review.opendev.org/c/openstack/openstacksdk/+/735352
Change-Id: I7b7cff4887ec77e4c9d98809150d9064eedafaf6

osc_lib/clientmanager.py

@@ -168,6 +168,10 @@ class ClientManager(object):
 
         self.sdk_connection = connection.Connection(config=self._cli_options)
 
+        # We might get auth_ref from SDK cacnihg
+        if hasattr(self.auth, 'auth_ref') and self.auth.auth_ref:
+            self._auth_ref = self.auth.auth_ref
+
         self._auth_setup_completed = True
 
     def validate_scope(self):

osc_lib/shell.py

@@ -495,6 +495,10 @@ class OpenStackShell(app.App):
     def clean_up(self, cmd, result, err):
         self.log.debug('clean_up %s: %s', cmd.__class__.__name__, err or '')
 
+        # Close SDK connection if available to have proper cleanup there
+        if self.client_manager.sdk_connection:
+            self.client_manager.sdk_connection.close()
+
         # Process collected timing data
         if self.options.timing:
             # Get session data