Catches all errors during fetching of SSH logs and re-raises.
Merge branch 'terminate-during-error-fetch' of github.com:selassid/mrjob into selassid-terminate-during-error-fetch
clean up selassid's change
add selassid to __credits__
Merge branch 'master' of github.com:Yelp/mrjob into selassid-terminate-during-error-fetch