Finish cleaning up com.trolltech -> org.qtproject in QtDBus

Finish cleaning up com.trolltech -> org.qtproject in QtDBus

Lots of uses of the annotations and error names, plus a bunch of local
unit test names (including one file that had to be renamed).

The meta object generator is updated to support both the old and new
names. That means some references to com.trolltech *must* remain in the
source code.

Task-number: QTBUG-23274
Change-Id: Icc38ae040232f07c437e7546ee744a4703f41726
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>
Reviewed-by: Lorn Potter <lorn.potter@nokia.com>