Adds Slurm 19 support

[sverhoeven]

Fixes #669

[codecov-io]

Codecov Report

Merging #670 into master will decrease coverage by 0.21%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #670      +/-   ##
============================================
- Coverage     86.86%   86.65%   -0.22%     
+ Complexity     1831     1830       -1     
============================================
  Files           112      112              
  Lines          5161     5214      +53     
  Branches        768      779      +11     
============================================
+ Hits           4483     4518      +35     
- Misses          462      472      +10     
- Partials        216      224       +8     

Flag	Coverage Δ	Complexity Δ
#fixedclientenvironment	26.04% <ø> (-0.23%)	489.00 <ø> (ø)
#integration	57.42% <ø> (+0.18%)	1022.00 <ø> (+2.00)
#livelocal	20.73% <ø> (+1.12%)	389.00 <ø> (+24.00)
#unit	61.29% <ø> (-0.11%)	1428.00 <ø> (-1.00)

Impacted Files	Coverage Δ	Complexity Δ
...ter/xenon/adaptors/schedulers/ScriptingParser.java	85.35% <0.00%> (-7.76%)	49.00% <0.00%> (-2.00%)
...enon/adaptors/schedulers/slurm/SlurmScheduler.java	76.92% <0.00%> (-0.48%)	36.00% <0.00%> (ø%)
...iencecenter/xenon/adaptors/shared/ssh/SSHUtil.java	76.21% <0.00%> (+0.25%)	35.00% <0.00%> (ø%)

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[jmaassen]

Epic code. Almost made me cry ;-)