fix: Move system_scope check to the keystone_client

Avoids the error from keystone:
Authentication cannot be scoped to multiple targets. Pick one of: project, domain, trust, system or unscoped

Author: enolfc

caso/extract/manager.py

@@ -131,8 +131,6 @@ def projects(self):
 
     def _get_keystone_client(self, project=None, system_scope="all"):
         """Get a Keystone Client to get the projects that we will use."""
-        if project:
-            system_scope = None
         client = keystone_client.get_client(
             CONF, project=project, system_scope=system_scope
         )

caso/keystone_client.py

@@ -37,6 +37,8 @@
 def get_session(conf, project, system_scope=None):
     """Get an auth session."""
     # First try using project_id
+    if project:
+        system_scope=None
     auth_plugin = loading.load_auth_from_conf_options(
         conf, CFG_GROUP, project_id=project, system_scope=system_scope
     )