ECW: don't try to close the poFileView object of a ECW dataset when called from the GDAL global destructor

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@26488 f0d54148-0727-0410-94bb-9a71ac55c965
Java: add multireadtest utility

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@26489 f0d54148-0727-0410-94bb-9a71ac55c965