Report "report" from report keys.

Info is redundant with the /report/ in the URI, so may as well shorten it up
and establish a convention before this goes out into the wild.

Ex: /gutterball/reports/consumer_trend_report becomes:
/gutterball/reports/consumer_trend
Merge pull request #771 from candlepin/dgoodwin/gb-report-names

Report "report" from report keys.