tst_QLibrary::version occasionally fails in CI

********* Start testing of tst_QLibrary *********
Config: Using QtTest library 5.12.0, Qt 5.12.0 (arm64-little_endian-lp64 shared (dynamic) release build; by GCC 6.3.0)
PASS   : tst_QLibrary::initTestCase()
PASS   : tst_QLibrary::load(ok00)
PASS   : tst_QLibrary::load(notexist)
PASS   : tst_QLibrary::load(badlibrary)
PASS   : tst_QLibrary::load(ok01 (with suffix))
PASS   : tst_QLibrary::load(ok02 (with non-standard suffix))
PASS   : tst_QLibrary::load(ok03 (with many dots))
PASS   : tst_QLibrary::resolve(ok00)
PASS   : tst_QLibrary::resolve(bad00)
PASS   : tst_QLibrary::resolve(bad01)
PASS   : tst_QLibrary::unload(mylib)
PASS   : tst_QLibrary::unload(ok01)
PASS   : tst_QLibrary::unload_after_implicit_load()
PASS   : tst_QLibrary::isLibrary(bad)
PASS   : tst_QLibrary::isLibrary(.a)
PASS   : tst_QLibrary::isLibrary(.bundle)
PASS   : tst_QLibrary::isLibrary(.dll)
PASS   : tst_QLibrary::isLibrary(.DLL)
PASS   : tst_QLibrary::isLibrary(.dl2)
PASS   : tst_QLibrary::isLibrary(.dylib)
PASS   : tst_QLibrary::isLibrary(.sl)
PASS   : tst_QLibrary::isLibrary(.so)
PASS   : tst_QLibrary::isLibrary(.so+version)
PASS   : tst_QLibrary::isLibrary(version+.so)
PASS   : tst_QLibrary::isLibrary(version+.so+version)
PASS   : tst_QLibrary::version(ok00, version 1)
PASS   : tst_QLibrary::version(ok00, version 2)
FAIL!  : tst_QLibrary::version(ok00, default to last version) Compared values are not the same
   Actual   (fnVersion())  : 1
   Expected (resultversion): 2
   Loc: [../tst_qlibrary.cpp(168)]
PASS   : tst_QLibrary::errorString(bad load())
PASS   : tst_QLibrary::errorString(call errorString() on QLibrary with no d-pointer (crashtest))
FAIL!  : tst_QLibrary::errorString(bad resolve) '!lib.isLoaded() || lib.unload()' returned FALSE. ()
   Loc: [../tst_qlibrary.cpp(388)]
FAIL!  : tst_QLibrary::errorString(good resolve) '!lib.isLoaded() || lib.unload()' returned FALSE. ()
   Loc: [../tst_qlibrary.cpp(388)]
PASS   : tst_QLibrary::errorString(load invalid file)
PASS   : tst_QLibrary::loadHints(ok01 (with suffix))
PASS   : tst_QLibrary::loadHints(ok02 (with non-standard suffix))
PASS   : tst_QLibrary::loadHints(ok03 (with many dots))
PASS   : tst_QLibrary::fileName(ok02)
FAIL!  : tst_QLibrary::multipleInstancesForOneLibrary() Compared values are not the same
   Actual   (lib1.isLoaded()): 1
   Expected (false)          : 0
   Loc: [../tst_qlibrary.cpp(485)]
PASS   : tst_QLibrary::cleanupTestCase()
Totals: 35 passed, 4 failed, 0 skipped, 0 blacklisted, 79ms
********* Finished testing of tst_QLibrary *********