Instead of using command line args to drive the execution of post.sh
use the new environment variables that are set by the test executor (see
atlasexternals!901 (merged), atlasexternals!908 (merged)).
Also add noerror.sh post-processing script that can be used to check test
log files for common errors patterns. This is useful when no full
reference file comparison is needed but the output should still be
free of errors.
TODO: