walelt was deadlocking because was locked twice

When adding to address book wallet is locked but in our GetAliasAddress
we were locking again, causing a deadlock.... I suggest we review
anywhere we use service functions anywhere but RPC calls as they may be
double locking and causing (wallet hang bugs as reported by people).. I
use TRY_LOCK which DOESN"T lock if its already locked, so I suggest in
our services to use TRY_LOCK everywhere, coderboo to review.

Removed sendtoalias, not needed.