fix two cases of bad indentation in exception handling code

[rolinh]

This PR fixes two cases of bad code indentation in exception handling code.

[saadkadhi]

Thanks for catching this.

[rolinh]

On a side note, it is quite brutal to call sys.exit() on a request exception. This prevents any client of the library from handling this case properly.

IMHO, it would be better to create a custom exception, say TheHiveException for instance, and wrap the underlying requests exception when it occurs. This way, a client can properly handle the exception and deal with it.