Fixed syntax error and fixed indentation in generate model

Signed-off-by: mamor <mamor.dev@gmail.com>

--
### Before:
$ php oil g model test name:varchar[255] age:int[11] -f
$ php oil g model test name:varchar[255] age:int[11] -f --mysql-timestamp

#### Contains a syntax error that no comma

		protected static $_properties = array(
			'id',
			'name',
		'age'
			'created_at',
			'updated_at',
		);

$ php oil g model test name:varchar[255] age:int[11] -f --no-timestamp

		protected static $_properties = array(
			'id',
			'name',
		'age'
		);

$ php oil g model test name:varchar[255] age:int[11] -f --crud

		protected static $_properties = array(
			'id',
			'name',
		'age'
		);

### After:
$ php oil g model test name:varchar[255] age:int[11] -f
$ php oil g model test name:varchar[255] age:int[11] -f --mysql-timestamp

	protected static $_properties = array(
		'id',
		'name',
		'age',
		'created_at',
		'updated_at',
	);

$ php oil g model test name:varchar[255] age:int[11] -f --no-timestamp

	protected static $_properties = array(
		'id',
		'name',
		'age',
	);

$ php oil g model test name:varchar[255] age:int[11] -f --crud

	protected static $_properties = array(
		'id',
		'name',
		'age',
	);