tst_QSslCertificate::fromPath is very slow and crashes due to QSslCertificate::fromPath running wild

The test tests QSslCertificate::fromPath with some very funky regexes, which somehow seems to trigger iterating files way higher in the file hierarchy than the location of the test certificates. In my case it tries to open every single file in my ~/dev/qt directory to see if it's a certificate.