chore(master): merge maint-0.9

[tiborsimko]

• feat(helm): allow cluster administrator to configure ingress host (feat(helm): allow cluster administrator to configure ingress host (#588) #588)
• ci(commitlint): improve checking of merge commits (chore(master): merge maint-0.9 #590)

[codecov]

Codecov Report

Attention: Patch coverage is 82.35294% with 6 lines in your changes missing coverage. Please review.

Project coverage is 73.57%. Comparing base (13d1c5d) to head (f1764ed).
Report is 24 commits behind head on master.

Files with missing lines	Patch %	Lines
reana_workflow_controller/k8s.py	85.00%	3 Missing ⚠️
...eana_workflow_controller/rest/workflows_session.py	75.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #590      +/-   ##
==========================================
+ Coverage   73.39%   73.57%   +0.17%     
==========================================
  Files          15       15              
  Lines        1372     1385      +13     
==========================================
+ Hits         1007     1019      +12     
- Misses        365      366       +1     

Files with missing lines	Coverage Δ
reana_workflow_controller/config.py	100.00% <100.00%> (ø)
reana_workflow_controller/workflow_run_manager.py	79.80% <100.00%> (+0.09%)	⬆️
reana_workflow_controller/k8s.py	88.88% <85.00%> (+0.75%)	⬆️
...eana_workflow_controller/rest/workflows_session.py	72.34% <75.00%> (-0.39%)	⬇️

[mdonadoni]

Could you please update the PR to also include this missing commit? 784efee

Regarding instead the changes to commitlint, could you also add the other changes to ci.yml from this commit? reanahub/reana-workflow-engine-snakemake@690dfc2

[mdonadoni]

Looks good!