adding Ubuntu 18.04 compatibility

[luke-c-sargent]

This PR addresses a few issues with using this component of the GalaxyKickstart stack:

1. using ppa:natefoo/slurm-drmaa to get slurm components
2. slurm-wlm in lieu of slurm-llnl when using Ubuntu 18.04
3. fix in templates/configure_slurm.py.j2 to deal with some cruft left in the 'split' mechanism of status parsing

this has been tested on Ubuntu 18.04; i was able to install some tools from the shed and run Galaxy 101 to completion. When using it as part of GalaxyKickstart, I successfully installed to Ubuntu 16.04 and 18.04, though it required some modifications to galaxy-os which i plan to issue a PR to should this approach be deemed acceptable.

critiques welcome!

[drosofff]

Hi @luke-c-sargent. What are the modification planned in ansible-galaxy-os ?

[drosofff]

I see @luke-c-sargent !

No package matching 'slurm-drmaa-dev'

It works effortlessly in ubuntu 16.04, so at least this part of deployment in galaxykickstart is preserved ;-)
For the rest, I guess it will be ok with the change in galaxy-os

[luke-c-sargent]

@drosofff
the mentioned galaxy-os PR:
galaxyproject/ansible-galaxy-os#29

it's the same repo addition, since that role also installs slurm-drmaa-dev; i assume the redundancy is for flexibility, in case you want to use either one role or the other, but not both (irrelevant for GKS).

Side note: 14.04 installations no longer work; this is probably for the best since its end of life is next month, but many of the ansible-galaxy-* roles mention it as the preferred Ubuntu version, which should probably be changed.

[abretaud]

Could you rebase/fix the conflicts? There's been some change on the master including things overlapping with this PR + the tests are now run with ubuntu 18.04