Autotests fail on Windows

[plfiorini]

See https://ci.appveyor.com/project/plfiorini/fluid/builds/19840593/job/3wdrn4tdhn48whb1

Config: Using QtTest library 5.10.1, Qt 5.10.1 (i386-little_endian-ilp32 shared (dynamic) release build; by MSVC 2015)
PASS   : tst_core::ClipboardTests::initTestCase()
FAIL!  : tst_core::ClipboardTests::test_clear_should_fire_textChanged() Compared values are not the same
   Actual   (): 0
   Expected (): 1
C:\projects\fluid\tests\auto\core\tst_clipboard.qml(57) : failure location
PASS   : tst_core::ClipboardTests::test_clipboard_works()
PASS   : tst_core::ClipboardTests::cleanupTestCase()
PASS   : tst_core::DateTests::initTestCase()
PASS   : tst_core::DateTests::test_dayOfWeek()
PASS   : tst_core::DateTests::test_formatDuration()
FAIL!  : tst_core::DateTests::test_formattedDate() Compared values are not the same
   Actual   (): 12/21/2012
   Expected (): 21 Dec 2012
C:\projects\fluid\tests\auto\core\tst_date.qml(39) : failure location
FAIL!  : tst_core::DateTests::test_friendlyTime() Compared values are not the same
   Actual   (): 12/21/2012 1:37 PM
   Expected (): 21 Dec 2012 13:37:00
C:\projects\fluid\tests\auto\core\tst_date.qml(59) : failure location
PASS   : tst_core::DateTests::cleanupTestCase()
PASS   : tst_core::ClipboardTests::initTestCase()
FAIL!  : tst_core::ClipboardTests::test_clear_should_fire_textChanged() Compared values are not the same
   Actual   (): 0
   Expected (): 1
C:\projects\fluid\tests\auto\core\tst_dateutils.qml(57) : failure location
PASS   : tst_core::ClipboardTests::test_clipboard_works()
PASS   : tst_core::ClipboardTests::cleanupTestCase()
PASS   : tst_core::UtilsTests::initTestCase()
PASS   : tst_core::UtilsTests::test_scale()
PASS   : tst_core::UtilsTests::cleanupTestCase()
Totals: 13 passed, 4 failed, 0 skipped, 0 blacklisted, 111ms
********* Finished testing of tst_core *********
ERROR: Process failed with exit code 4.