This is a correction to commit df8e3447

job_submit/lua: Enable reading and writing job environment variables.
For example: if (job_desc.environment.LANGUAGE == "en_US") then ...

This reverts commit b87df0fb2ae474f815ea707844ae30c7b8606dc9.

This removes some old logic that was just commented out when the
LUA tables were converted to a new structure.

The error was being triggered by logic to collect accounting
information starting and not being completed when testing to
start a node ping RPC. In other words, the logic wasn't testing
for the completion of one RPC against the start of that same
RPC, but against the start of a different RPC. This change
moves all of the timeout logic into the ping_nodes.c module
where we can make sure that the timing of different RPCs do
not get confused with each other.
bug 1190

This is a correction to commit 1eb32d90
so the select/cray plugin can be built on non-Cray system (for testing).
bug 1587

GRES counters changed in v15.08 from 32- to 64-bit.

slurmd was logging:
"Error reading step 2031886.0 memory limits" (with various job/step IDs)
because it was treating SLURM_SUCCESS as an error rather than SLURM_ERROR
bug 1589

Add logging of premature EOF

Disable changes to GRES count while jobs are running on the node.
Previous logic could clear GRES count data and generate counter
underflow then when attemtping to deallocate the job's resources
(including future job terminations when computing when and where
pending jobs will start as part of backfill scheduling logic).
bug 1589

if many steps/jobs finish at once.

* Add "--thread-spec" option to salloc, sbatch and srun commands. This is
  the count of threads reserved for system use per node.
* Add ability for scontrol to get/set job ThreadSpec
* sivew: Add job ThreadSpec field to get/set
* Modify select/cons_res to manage job allocations while leaving specialized
  threads for system use.
* core_spec plugins: Fix system task binding logic and logging
* Modify squeue output for thread_spec values
* task/affinity and cgroup: Enhanced task binding logic

bug 1589

bug 1570

A function in sshare changed, which broke several tests.
The commit that broke the tests is 5dacc0fc

Bug 1587

Only lowercase usernames are supported.