Interrupted omc upgrade corrupts the binary and causes segmentation fault

[palonsoro]

Steps to reproduce:

• Run omc upgrade --to=latest
• While the binary is downloading, interrupt omc command in anyway (either because internet connection goes away or you are too impatient and prefer to retry later)
• omc binary ends up corrupted (as if it only contained the bits downloaded before the command was cancelled)

It might work better to download it to a temporary location/name and perform a more atomical replacement.