Fix SLURM configuration for latest AiiDAlab image

[danielhollas]

It looks like the location of the slurm.conf changed from /etc/slurm-llnl/slurm.conf to /etc/slurm/slurm.conf, possibly because of the Ubuntu update? Should be a simple fix in the Dockerfile.

[danielhollas]

Strange, after moving the conf file the new error is

slurmctld: fatal: mkdir(/var/lib/slurm-llnl/slurmctld): No such file or directory

[danielhollas]

Now still running into weird permission issues when using the aiida user

$ srun hostname
srun: error: task 0 launch failed: Slurmd could not execve job
slurmstepd-localhost: error: task_g_set_affinity: Operation not permitted
slurmstepd-localhost: error: _exec_wait_child_wait_for_parent: failed: No error

Adding aiida user to slurm group did not help unfortunately.

[danielhollas]

Things now work, but I opened #10 as a follow-up.