fix date fields include test

DataTypes.DATE was set to "DATETIME2", which has implications for internal
sequelize code. Instead we should be using a data type mapping, like postgres
support.

lib/dialects/mssql/data-types.js

@@ -4,7 +4,6 @@ var DataTypes = require('../../data-types');
 
 //drop table Group
 DataTypes.BOOLEAN = 'BIT';
-DataTypes.DATE = 'DATETIME2';
 DataTypes.NOW = 'GETDATE()';
 DataTypes.UUID = 'UNIQUEIDENTIFIER';
 DataTypes.BLOB = 'VARBINARY(MAX)';
@@ -27,4 +26,4 @@ DataTypes.STRING.prototype = {
   }
 };
 
-module.exports = DataTypes; 
\ No newline at end of file
+module.exports = DataTypes;

lib/dialects/mssql/sql-generator.js

@@ -303,6 +303,14 @@ module.exports = {
       "END;"].join(' ');
   },
 
+  dataTypeMapping: function(tableName, attr, dataType) {
+    if (Utils._.includes(dataType, 'DATETIME')) {
+      dataType = dataType.replace(/DATETIME/, 'DATETIME2');
+    }
+
+    return dataType;
+  },
+
   getCreateTableSql: function(tableName, attributes, options) {
     var query = "CREATE TABLE <%= tableName %> (<%= attributes%>)";
     var attrStr     = []
@@ -312,14 +320,16 @@ module.exports = {
       }));
 
     for (var attr in attributes) {
-      var dataType = attributes[attr];
+      var dataType = this.dataTypeMapping(tableName, attr, attributes[attr]);
       attrStr.push(quoteIdentifier(attr) + " " + dataType);
     }
+
     var values = {
       unquotedTable: tableName,
       tableName: quoteIdentifier(tableName.toString()),
       attributes: attrStr.join(", ")
     };
+
     query = addTableExistsWrapper(query);
     return Utils._.template(query)(values).trim() + ";";
   },