Fix bug with double load of bitcore-lib.
Fix bug with double load of bitcore-lib.

braydonf/bitcore-node,kleetus/bitcore-node,zcoinrocks/bitcore-node,snogcel/bitcore-node-dash,zcoinrocks/bitcore-node,kleetus/bitcore-node,braydonf/bitcore-node,snogcel/bitcore-node-dash