feat(job): add kubernetes_queue to job spec

[CameronMcClymont]

Closes reanahub/reana-job-controller#493

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 0.90%. Comparing base (a565875) to head (6436671).

Files with missing lines	Patch %	Lines
reana_workflow_engine_cwl/cwl_reana.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #303      +/-   ##
=========================================
- Coverage    0.90%   0.90%   -0.01%     
=========================================
  Files          10      10              
  Lines         551     552       +1     
=========================================
  Hits            5       5              
- Misses        546     547       +1     

Files with missing lines	Coverage Δ
reana_workflow_engine_cwl/cwl_reana.py	0.00% <0.00%> (ø)

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