Make drydock case sensitive in attribute parsing
Summary: See D4047. Get rid of this strtolower() junk.
Test Plan:
$ /bin/drydock lease --type working-copy --attributes repositoryID=12 Acquired Lease 66
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2015
Differential Revision: https://secure.phabricator.com/D4048