cosmetic: osmo_fsm_inst_update_id(): don't log "allocate"

On erratic id in osmo_fsm_inst_update_id(), don't say "Attempting to allocate
FSM instance".

Escape the invalid id using osmo_quote_str().

Change-Id: I770fc460de21faa42b403f694e853e8da01c4bef
diff --git a/tests/fsm/fsm_test.err b/tests/fsm/fsm_test.err
index c4ee46f..3e01d48 100644
--- a/tests/fsm/fsm_test.err
+++ b/tests/fsm/fsm_test.err
@@ -38,12 +38,12 @@
   osmo_fsm_inst_find_by_name("Test_FSM(arbitrary_id)") == fi
   osmo_fsm_inst_find_by_id("arbitrary_id") == fi
 osmo_fsm_inst_update_id("")
-Attempting to allocate FSM instance of type 'Test_FSM' with illegal identifier ''
+Attempting to set illegal id for FSM instance of type 'Test_FSM': ""
     rc == -22, ok
   osmo_fsm_inst_name() == "Test_FSM(arbitrary_id)"
   osmo_fsm_inst_find_by_name("Test_FSM(arbitrary_id)") == fi
 osmo_fsm_inst_update_id("invalid.id")
-Attempting to allocate FSM instance of type 'Test_FSM' with illegal identifier 'invalid.id'
+Attempting to set illegal id for FSM instance of type 'Test_FSM': "invalid.id"
     rc == -22, ok
   osmo_fsm_inst_name() == "Test_FSM(arbitrary_id)"
   osmo_fsm_inst_find_by_name("Test_FSM(arbitrary_id)") == fi