+ clean up FASTQs in /tmp after bwamem finishes aligning

- This is one of several immediate tasks that will help reclaim some
   of /tmp disk space that is being used with HiSeq X Ten data.  See
   [BIO-1229][1] for more details.

[1]: https://jira.gsc.wustl.edu/browse/BIO-1229
It does:
my @d = List::MoreUtils::uniq(map { dir($_) } map { '/gscuser/'.$_ } (qw/ ebelter nnutter idas ebelter /))
$Path_Class_Dir1 = /gscuser/ebelter;
$Path_Class_Dir2 = /gscuser/nnutter;
$Path_Class_Dir3 = /gscuser/idas;