[YUNIKORN-501] Include node-selector and tolerations in the placeholder's pod spec.

[yangwwei]

No description provided.

[codecov]

Codecov Report

Merging #217 (4314d00) into YUNIKORN-2 (132fdae) will decrease coverage by 0.24%.
The diff coverage is 100.00%.

@@              Coverage Diff               @@
##           YUNIKORN-2     #217      +/-   ##
==============================================
- Coverage       59.66%   59.41%   -0.25%     
==============================================
  Files              35       35              
  Lines            3131     3129       -2     
==============================================
- Hits             1868     1859       -9     
- Misses           1182     1188       +6     
- Partials           81       82       +1     

Impacted Files	Coverage Δ
pkg/cache/application_events.go	53.06% <ø> (ø)
pkg/cache/placeholder_manager.go	77.27% <ø> (+3.35%)	⬆️
pkg/cache/task.go	70.40% <ø> (-4.00%)	⬇️
pkg/common/si_helper.go	63.15% <ø> (ø)
pkg/cache/placeholder.go	100.00% <100.00%> (ø)

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[yangwwei]

Merging this to the dev branch. I will create a PR for the review before committing to the master.