return txp when republishing

lib/server.js

@@ -1881,7 +1881,7 @@ WalletService.prototype.publishTx = function(opts, cb) {
       self.storage.fetchTx(self.walletId, opts.txProposalId, function(err, txp) {
         if (err) return cb(err);
         if (!txp) return cb(Errors.TX_NOT_FOUND);
-        if (!txp.isTemporary()) return cb();
+        if (!txp.isTemporary()) return cb(null, txp);
 
         var copayer = wallet.getCopayer(self.copayerId);
 

test/integration/server.js

@@ -2369,8 +2369,9 @@ describe('Wallet service', function() {
             should.exist(tx);
             tx.id.should.equal('123');
             var publishOpts = helpers.getProposalSignatureOpts(tx, TestData.copayers[0].privKey_1H_0);
-            server.publishTx(publishOpts, function(err) {
+            server.publishTx(publishOpts, function(err, tx) {
               should.not.exist(err);
+              should.exist(tx);
               server.createTx(txOpts, function(err, tx) {
                 should.not.exist(err);
                 should.exist(tx);