Improving cmor fatal error handling about cmor

[doutriaux1]

@jypeter do you mind splitting this issue in two separate ones?

[jypeter]

No problem, go ahead

JYP @ SGS 2

[doutriaux1]

i meant you ;)

[dnadeau4]

I change the exit() called and send a SIGINT signal. With python, this mean that the program will not exit right away (kill -9), but when python "returns" it is possible to trap the signal. It was useful for my unittest to trap errors, but might have strange message since the code keeps running until the last functions call return. I might need to trap more "error" code.

[durack1]

@jypeter @ehogan @dnadeau4 this issue is now duplicated by #27 if there are any specific things required please add these to the #27 issue - closing now