Refs #7754. Fixing (most) VatesAPI directory cppcheck issues.
Refs #7754. Suppressing false positive.

If the offending code wasn't read, the plugin wouldn't work, no data would be
shown and people would be unhappy.
Refs #7754. Suppressing ParaView export symbols.

Since we can't always know where the ParaView source code lives and we don't
want cppcheck checking the ParaView code, we'll just have to suppress the
dll export symbols.
Refs #7754. More suppression of dll export symbols.

I think these are things that cppcheck should be handling correctly, but it
isn't. I see that there are other places in the code where it is having a
similar issue, so this code isn't alone.
Merge remote branch 'origin/feature/7754_cppcheck_vates'

Conflicts:
	Code/Mantid/Vates/VatesAPI/src/vtkSplatterPlotFactory.cpp

Refs #7754.