Apparently this (undocumented) TESTDATA feature creates resource files,
but lets you use wildcards as well, which is very handy.
The reason I didn't know/realize this when adapting the tests to use a
".qrc"-file* was because some of the test-cases were using relative
paths instead of the 'testDataDir' variable.
This commit fixes the remaining uses of relative paths, removes a
usage of QDir::setCurrent, and adapts QSslSocket to use TESTDATA.
* in now-reverted commit e1600c1a73
Change-Id: Iee6d88f1e0810eeaadac90e7d44bc6db84bfeabf
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Jesus Fernandez <Jesus.Fernandez@qt.io>
b14934547a