Qt Metrics v2.2: Autotest dashboard redesign for test case metrics

Autotest dashboard redesigned to show the autotest failed percentage
on level 1, and test cases and their failed percentage on level 2.
Test case data as well as the number of run autotests is read from
build and configuration specific XML files on testresults server.

Change-Id: Ib3688a0ffcca4ed7d92be4d217526a32610c8b55
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>