Ubuntu 22.04 and Python 3.10 preparation

Change-Id: I57a4ee39c101bdab610a6964de58eaa2653d37a3
Signed-off-by: Guillermo Calvino <guillermo.calvino@canonical.com>
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/n2vc/libjuju.py b/n2vc/libjuju.py
index 55ca859..de116f0 100644
--- a/n2vc/libjuju.py
+++ b/n2vc/libjuju.py
@@ -84,7 +84,7 @@
 
         self.loop = loop or asyncio.get_event_loop()
         self.loop.set_exception_handler(self.handle_exception)
-        self.creating_model = asyncio.Lock(loop=self.loop)
+        self.creating_model = asyncio.Lock()
 
         if self.vca_connection.is_default:
             self.health_check_task = self._create_health_check_task()