Test tst_plugin::test_wclAutoCommitWordSetting fails with hunspell

Steps to reproduce:

1. Setup development environment to Ubuntu 16.04
2. Install hunspell (especially en-gb)
   • apt-get install libhunspell libhunspell-dev libhunspell-en-gb
3. Force qtvirtualkeyboard to detect hunspell support
   1. find /usr -name pkgconfig
   2. export PKG_CONFIG_LIBDIR= all paths found above
      • Why hunspell support is not detected on Ubuntu by default?
      • On b2qt sysroot cross compilation, hunspell support is detected automatically
4. Compile
   1. PATH/TO/QMAKE/qmake
   2. make
   3. make install
5. Run test
   1. cd tests/auto/input
   2. PATH/TO/QMAKE/qmake
   3. make
   4. ./tst_inputpanel tst_plugin::test_wclAutoCommitWordSetting

Expected outcome:

• Test passes

Actual outcome:

• FAIL!  : inputpanel::tst_plugin::test_wclAutoCommitWordSetting(row 0) 'function returned false' returned FALSE. ()
•    Loc: [/home/sami/Work/qt5_pc/qtvirtualkeyboard/tests/auto/inputpanel/data/tst_inputpanel.qml(1639)]