ofono_client: Improve log around Scan() failure

Change-Id: I8558d7fe41c155db2a9710e1eccf15b6499f24ef
diff --git a/src/osmo_gsm_tester/ofono_client.py b/src/osmo_gsm_tester/ofono_client.py
index 45a4294..4deff9e 100644
--- a/src/osmo_gsm_tester/ofono_client.py
+++ b/src/osmo_gsm_tester/ofono_client.py
@@ -418,9 +418,11 @@
         # the registering succeeds while we are still waiting for Scan() to finsih.
         # So far the easiest seems to check if we are now registered and
         # otherwise schedule a scan again.
-        self.err('Scan() failed:', e)
+        self.err('Scan() failed, retrying if needed:', e)
         if not self.is_connected(mcc_mnc):
             self.schedule_scan_register(mcc_mnc)
+        else:
+            self.log('Already registered with network', mcc_mnc)
 
     def scan_cb_register_automatic(self, scanned_operators, mcc_mnc):
         self.dbg('scanned operators: ', scanned_operators);