Update auto approval to handle Boolean.TRUE as well as "true"

I recently switched to the develop branch and discovered that none of the scope auto approvals were working.  This made it so I couldn't log in with UAA.

Turns out that Jackson was unmarshalling the autoapprove boolean value to a Boolean.TRUE.

I noticed this fixed already in ApprovalsAdminEndpoints.  I just propagated that fix into the rest of uaa.

Mike