add filter based on begin&end time of start_date

filter of 'Start Date' & 'End Date' in Community Results page now works,
currently, only 20 records will be shown due to pagination is not
supported.
From server side, query from date to date is supported now, query as:
/api/v1/results?from=2016-11-01%2000:00:00&to=2017-06-01%2023:59:59

Change-Id: I482b117129dbae38fa5a2858a86442c80d87d19e
Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>