catch mutliple unique constraint messages from driver

There are more than one error messages related to unique
constraints that we need to catch. This closes one more broken
test, in ancitipation of the crate table refactoring which closes
the other.

lib/dialects/mssql/query-generator.js

@@ -474,8 +474,8 @@ module.exports = (function() {
     uniqueConstraintMapping: {
       code: 'EREQUEST',
       map: function(str) {
-        // we're manually remvoving uniq_ here for a future capability of defining column names explicitly
         var match = str.match(/Violation of UNIQUE KEY constraint '(.*)'. Cannot insert duplicate key in object '?(.*?)$/);
+        match = match || str.match(/Cannot insert duplicate key row in object .* with unique index '(.*)'/);
         if (match === null || match.length < 2) {
           return false;
         }

lib/dialects/mssql/query.js

@@ -165,6 +165,7 @@ module.exports = (function() {
   Query.prototype.formatError = function (err) {
     var match;
     match = err.message.match(/Violation of UNIQUE KEY constraint '(.*)'. Cannot insert duplicate key in object '?(.*?)$/);
+    match = match || err.message.match(/Cannot insert duplicate key row in object .* with unique index '(.*)'/);
     if (match && match.length > 1) {
       return new sequelizeErrors.UniqueConstraintError({
         name: 'SequelizeUniqueConstraintError',