Properly capture the stdout and stderr of fsl_sub

[prioux]

When fsl_sub handles a single task, it internally redirects the outputs with this code:

            /bin/sh <<EOF1 > ${LogDir}${JobName}.o$$ 2> ${LogDir}${JobName}.e$$
$@
EOF1

In the case where this is executing under CBRAIN, this will pollute the work directory with a lot of files named bash.oNNN and bash.eNNN instead of storing these in the CBRAIN capture files. The way to fix this is to remove the redirections altogether, if we're running in CBRAIN. (But: how to test that? Env variable?)