APPC CDT Future timestamp issue fix -new HTTP req

APPC CDT Future timestamp issue fix -new HTTP req

APPC CDT GUI generated timestamp in user browser in request data.
Sometimes the timestamp appeared in future compared to APPC server time.
To fix the APPC CDT Future timestamp issue adding a new HTTP request to
 DesignDBService to get UTC Timestamp from the APPC server.
Also adding this request to DbResponseProcessor, RequestValidator
 to avoid validation failures.
Modified DesignDBService.java to satisfy review comments.
Made additional corrections after failed build.

Change-Id: Ic9d3f1ebb42143e497e21520843a78ecb882d0fc
Issue-ID: APPC-1026
Signed-off-by: od7427 <od7427@att.com>