fixes #13866 - pin jwt for Ruby 1.9.3 compatibility
(cherry picked from commit 4c3f07102fa5e1ed0e3c2f146de0982c6552b58b)
fixes #13866 - pin jwt for Ruby 1.9.3 compatibility
(cherry picked from commit 4c3f07102fa5e1ed0e3c2f146de0982c6552b58b)