Set default Tuskar port to 8585

Changed port in TUSKAR_ENDPOINT_URL variable from 6385 to 8585 due to
changes in Tuskar - see I834be2e4444202aa8ee7eaaeecf26e0ca2f24eef.

Change-Id: I52e3cfede3aa70115b995caf22738938adb7573e
Merge "Set default Tuskar port to 8585"