upload error with cwd

[bud42]

For some reason, this getcwd errors out often. We could use shutil.make_archive() instead of shell zip command, then we don't need to change directory.

dax/dax/XnatUtils.py

Lines 1951 to 1955 in 19702b5

	initdir = os.getcwd()
	# Zip all the files in the directory
	os.chdir(directory)
	os.system('zip -r %s * > /dev/null' % fzip)
	# upload