Add script test_streamin_files_simple.sh, to test file systems without cpu/network load
Add script test_streamin_files_simple.py, to test file systems without cpu/network load
Add script create_streaming_files.py, a python version of create_streaming_files.sh
Add script test_streaming_files_simple.py, a python script for simple IO analysis with verification
Bugfix method chmod of class FuseBox, to prevent access error when changing permissions.
    Change return value to 0 (everything ok) instead of throwing an exception, which results in a non-zero return value.
fix test_streaming_files_simple.py
Modify script create_streaming_files.py, to create test files only if they do not already exist
Add script test_streaming_files_simple_cloudfusion.py, to test streaming files to cloudfusion