wikimedia / restbase / 888

Pull #205

travis-ci

Improve error reporting for subrequests

Sub-requests that don't directly throw errors (primarily cassandra at this
point) don't get very good error reporting right now, as much of the
information is lost while being wrapped into an HTTPError. This patch improves
this slightly by preserving more information.

29 of 29 new or added lines in 3 files covered. (100.0%)

743 of 871 relevant lines covered (85.3%)

106.84 hits per line