fix(seed): gulp task test:seed would hang on the gulp node process and not exit

the mongoose and sequelize connections were not closing, therefore leaving an event listener open

for connections and hanging the node.js process waiting for more work. By closing the connections on

both the gulp process is able to quit after performing the seed tasks.

Author: lirantal

server/gulpfile.js

@@ -218,29 +218,36 @@ gulp.task('ava:test:integration', function() {
     });
 });
 
+// Connects to Mongoose based on environment settings and seeds the database, performing
+// a drop of the mongo database to clear it out
 gulp.task('seed:mongoose', function(done) {
   const mongoose = require('./config/lib/mongoose');
 
   mongoose.connect()
     .then(mongoose.seed)
+    .then(mongoose.disconnect)
     .then(function() {
       done();
   });
 });
 
+// Connects to an SQL database, drop and re-create the schemas
 gulp.task('seed:sequelize', function(done) {
   const sequelize = require('./config/lib/sequelize');
 
   sequelize.seed()
     .then(function() {
+      sequelize.sequelize.close();
       done();
-  });
+    });
 });
 
+// Performs database seeding, used in test environments and related tasks
 gulp.task('test:seed', function(done) {
   runSequence('seed:mongoose', 'seed:sequelize', done);
 });
 
+// Run Integration Tests
 gulp.task('test:integration', function(done) {
   runSequence('env:test', 'server:bootstrap', 'ava:test:integration', done);
 });