fixed major bugs with multitask search
fixed major bugs with multitask search

raosudha89/vowpal_wabbit,raosudha89/vowpal_wabbit,raosudha89/vowpal_wabbit,raosudha89/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,raosudha89/vowpal_wabbit,raosudha89/vowpal_wabbit,raosudha89/vowpal_wabbit,hal3/vowpal_wabbit,raosudha89/vowpal_wabbit,hal3/vowpal_wabbit,raosudha89/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,raosudha89/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit