Tests: Disabled temporarily access type tests of QMetaMethod::Signal

Change in qtbase to make the QMetaMethod signals access Public instead
of Protected.

Change-Id: I2de17fdc7edb896eb82ae8f467919e4636904cf6
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Make sure we update texture parameters when using atlas textures.

The QSGTexture class tracks filter and wrap states internally
and only updates when new states have been set. When atlas
textures are used, multiple QSGTexture instances share the
same OpenGL texture id and the state will get out of sync.

Change-Id: Iaf6ba9764a67acf25d0a6b0a2fb18170122e3325
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>