Allow OptomechDevice to init even if its parent device cannot be found.
Allow OptomechDevice to init even if its parent device cannot be found.

campagnola/acq4,acq4/acq4,mgraupe/acq4,mgraupe/acq4,meganbkratz/acq4,pbmanis/acq4,pbmanis/acq4,campagnola/acq4,mgraupe/acq4,acq4/acq4,acq4/acq4,mgraupe/acq4,mgraupe/acq4,meganbkratz/acq4,pbmanis/acq4,pbmanis/acq4,meganbkratz/acq4,campagnola/acq4,campagnola/acq4,acq4/acq4,meganbkratz/acq4