Don't warn about modifying critical cmake vars when testing on travis
Don't warn about modifying critical cmake vars when testing on travis

RIVeR-Lab/walrus,OAkyildiz/walrus,RIVeR-Lab/walrus,OAkyildiz/walrus,RIVeR-Lab/walrus,OAkyildiz/walrus,OAkyildiz/walrus,RIVeR-Lab/walrus,OAkyildiz/walrus,OAkyildiz/walrus,RIVeR-Lab/walrus,RIVeR-Lab/walrus,OAkyildiz/walrus,RIVeR-Lab/walrus