Replace sys.exit(-1) by sys.exit(1)

[lcheylus]

In tuptime Python code, sys.exit(-1) is used for error code. Generally, we use 1 for error code in this case => sys.exit(1).

[rfrail3]

Appreciate that you look into this, it's fixed on dev branch.

[lcheylus]

After review of your last commits in master branch, it's OK : every sys.exit uses 1 for error code.