Remove the disconnect to avoid race condition

test/common_test.js

@@ -44,7 +44,7 @@ module.exports = function testSchema(exportCasesHere, dataSource) {
   };
 
   function allTestsDone() {
-    dataSource.disconnect();
+    // dataSource.disconnect();
     console.log('Test done in %dms\n', Date.now() - start);
   }
 

test/relations.test.js

@@ -23,7 +23,7 @@ describe('relations', function () {
   });
 
   after(function () {
-    db.disconnect();
+    // db.disconnect();
   });
 
   describe('hasMany', function () {

test/validations.test.js

@@ -44,7 +44,7 @@ describe('validations', function () {
   });
 
   after(function () {
-    db.disconnect();
+    // db.disconnect();
   });
 
   describe('commons', function () {