Removed boost::bind in jsproc.cc, rdb_protocol.cc, rdb_backfill.cc unit tests.
Removed boost::bind in cross_thread_watchable.cc, clustering_branch.cc, rpc_connectivity.cc, fifo_enforcer.cc, memcached_protocol.cc, and rpc_semilattice.cc unit tests.
Removed boost::bind from the rest of unittest/.