Closes-Bug: 1404357

Added stdout and stderr redirection to files in the 'mpirun' child
process created by the 'shell'.
Deleted dormant code.
Added propagarion of 'SQ_SEAMONSTER' environment variable to 'mpirun'.

Change-Id: I9bf3748a1a83401e6d06943f33fd2e5c82e744f8
Merge "Closes-Bug: 1404357"