When your film only has two characters, you’d better make damn sure that they’re likeable — or a at least a tiny bit compelling. That’s how the survival film “Centigrade” fails from the offset. This repetitive, based-on-a-true-story film is a torturous two hour argument between a husband and wife who can’t stand each other. If the two main characters don’t even like each other, then why should the audience like or…