Make test config Windows 8.1/ MSVC 2013 enforcing

Issues:

• First run was in Finnish locale, thus date time, etc, failed: Fixed
• tst_qsettings was not running with admin rights. Proposing to get rid of that requirement: 9a9feab102019d810a1120ef9953c15b48f24640. ( https://codereview.qt-project.org/#change,81839 ), it is also being fixed admin-wise

• Failures in tst_QtConcurrentIterateKernel (Not locally reproduceable)

  QDEBUG : tst_QtConcurrentIterateKernel::blockSize() block size 128
  FAIL!  : tst_QtConcurrentIterateKernel::blockSize() 'peakBlockSize >= expectedMinimumBlockSize' returned FALSE. ()
  tst_qtconcurrentiteratekernel.cpp(273) : failure location
  

  This one is not reproduceable on the test machine, either, but apparently often fails with MSVC2012,2013, adding diagnostics: 7d012552b03cd71a44591adf1e148b7b5eab0431 https://codereview.qt-project.org/#change,82218

• Failures in accessibility (Not locally reproduceable)

  FAIL!  : tst_QAccessibility::menuTest() 'file->isVisible() && !edit->isVisible() && !help->isVisible()' returned FALSE. ()
  tst_qaccessibility.cpp(1418) : failure location
  QWARN  : tst_QAccessibility::menuTest() 9 accessibility event(s) were not handled in testfunction 'menuTest':
  QWARN  : tst_QAccessibility::menuTest()  1: Object: 0x3c2e8405c0 Event: 'ObjectShow' Child: -1
  

  : 0fadbc7ed909de1caa7833abaf7cb1c3b20b4efb (31.3.2014, stable, 5.3) https://codereview.qt-project.org/#change,82088

• Timeout in tst_qgraphicsproxywidget::actionsContextMenu() (reproduceable only with MSTSC [Remote Desktop Connection] with setting "High Bandwidth/LAN"), tst_qgraphicsproxywidget crashes in debug mode, but that is known): 27fa02e29d873db4fdf1e77feee600f1e15e94f4 (stable, 31.3.2014, 5.3) https://codereview.qt-project.org/#change,82086

• Timeouts in tst_qtoolbutton(reproduceable only with MSTSC with setting "High Bandwidth/LAN") , in QToolButton::showMenu() which the test tries to close via simulated mouse click: b980df3f3ced07f35bc9e817c53ae13d48f84994 (stable, 31.3.2014, 5.3) https://codereview.qt-project.org/82016