Qtqa: Configurable script instead of default ci testrunner

Some mobile platforms can't be tested with default CI test setup.
Instead some of them, like Android Qt port is relying on its own
testrunner script. To be able to utilize this in CI, we need a way
to run non-default testrunners as well.

Task-number: QTQAINFRA-641
Change-Id: I8f59c20d1fc3fbe204f3ac624aad056e68e91c41
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Fix "missing AutoLoader" complain in OSX 10.9

Requiring AutoLoader module on testrunner fixes the
"Can't locate package AutoLoader for @Proc::Reliable::ISA"
warning, seen in OSX 10.9 nodes.

Change-Id: Ie00318d7b2fe1df7d445b661f96cccc00b8fed38
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
DNS test zone: update to the actual zone deployed in qt-project.org

Change-Id: I849f0db278dfe2b27681c904430f8a45f564d9eb
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>