LSF job termination reason logging

When a job finishes, LSF reports the last job termination action it took against the job and logs it into lsb.acct.

If a running job exits because of node failure, LSF sets the correct exit information in lsb.acct,, and the job output file. Jobs terminated by a signal from LSF, the operating system, or an application have the signal logged as the LSF exit code. Exit codes are not the same as the termination actions.