disable transaction and migration support for mssql for the time being

lib/dialects/mssql/index.js

@@ -17,6 +17,8 @@ MssqlDialect.prototype.supports = _.merge(_.cloneDeep(Abstract.prototype.support
   'DEFAULT VALUES': true,
   'LIMIT ON UPDATE': true,
   lock: false,
+  transactions: false,
+  migrations: false,
   autoIncrement: {
     identityInsert: true,
     defaultValue: false,

test/model/create.test.js

@@ -196,7 +196,7 @@ describe(Support.getTestDialectTeaser("Model"), function () {
       }
 
       // Creating two concurrent transactions and selecting / inserting from the same table throws sqlite off
-      (dialect !== 'sqlite' ? it : it.skip)('works without a transaction', function () {
+      (dialect !== 'sqlite' && dialect !== 'mssql' ? it : it.skip)('works without a transaction', function () {
         return Promise.join(
           this.User.findOrCreate({ where: { uniqueName: 'winner' }}),
           this.User.findOrCreate({ where: { uniqueName: 'winner' }}),