The various variants duplicated some rather complex code around
varying setup in the middle. Rework in terms of a macro that defines
main() and takes the setup code as a parameter. That setup code also
had some common structure, so package that in a setup macro that takes
the class to be used.
Reworked various testlib selftests that were using QTEST_MAIN_IMPL();
change to use the new QTEST_MAIN_WRAPPER() and TEST_MAIN_SETUP().
These might be better dealt with by supporting a second form of the
initMain() test-setup function in the test classes, that takes
references for argc and argv, to let a test massage its command-line
options.
Change-Id: I7fb16b38d51c80ba2f5c9c82f3b7a37ffc636795
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>