Fix for problems when adding a user for the first time to a new cluster with a 2.1 sacctmgr without specifying a default account.

    rather than requeue it.

Requires changing a #define in the code

Add support for fair-share scheduling to be based upon resource use at the level of bank accounts and ignore use of individual users. Patch by Par Andersson, National Supercomputer Centre, Sweden.

- The node count in the bluegene select plugin job record was getting set to 
    zero, which prevented the job from re-running after a requeue
- Fix bug in new kill job logic which tried to set the job's start time in 
   the RPC from slurmctld to slurmd. We need to leave the value as zero rather 
   than using a NULL job pointer if the job is not found

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