QtX11Extras: Remove unused configuration for macx-clang_no-framework_OSX_10.8

The QtX11Extras CI doesn't test macx-clang_no-framework_OSX_10.8, so this
configuration is useless.

Change-Id: I2872a56488ee0485ee9c64457e475624b524cf23
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Qt5: Push down qt.qtqa-tests.insignificant

So that we can disable qt.qtqa-tests.insignificant on each project
as soon as it is confirmed as passing.

Change-Id: I5dcffa8dcce896a6bac7514e5ae3997eb53f2646
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Qt5: Remove qt.branch for this repository

qt.branch only makes sense for modules other than qt5.git according to
https://qt.gitorious.org/qt/qtqa/blobs/master/scripts/qt/qtmod_test.pl#line92

Change-Id: I96f9d8e07072606de150f5fc1d568864408684de
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Qt5, QtBase, QtMultimedia, QtQuick1: set some configs enforcing

These are passing.  Make sure they stay that way.

Change-Id: I2a6084bbaf75ca88a8c03837c7bdc4830b6cd70c
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>