Handle python-dbus not installed

old-commit-hash: 25054cdc0538a0324b7f7c1bcc9d6166291b4e10

common/hardware_tici.py

@@ -25,7 +25,11 @@ MM_MODEM_ACCESS_TECHNOLOGY_LTE = 1 << 14
 
 class Tici(HardwareBase):
   def __init__(self):
-    import dbus  # pylint: disable=import-error
+    # TODO: remove when dbus is installed everywhere
+    try:
+      import dbus  # pylint: disable=import-error
+    except ImportError:
+      return
 
     self.bus = dbus.SystemBus()
     self.nm = self.bus.get_object(NM, '/org/freedesktop/NetworkManager')