Fixed search path for site settings file in linux installs

ParaView will now look under <install_directory>/share/paraview-4.1
for site-wide custom settings.

Change-Id: I5a7226551090ecc15dd468995276d1da6b7d723c
Merge topic '13575_site_settings_search_paths' into next

f2cde10d Fixed search path for site settings file in linux installs