[scmsource] Allow queue item folding to happen

[atanasenko]

This change is 

[codecov-io]

Codecov Report

Merging #286 into master will decrease coverage by 0.02%.
The diff coverage is 25%.

@@             Coverage Diff              @@
##             master     #286      +/-   ##
============================================
- Coverage     46.84%   46.81%   -0.03%     
  Complexity      774      774              
============================================
  Files           181      182       +1     
  Lines          4547     4556       +9     
  Branches        386      387       +1     
============================================
+ Hits           2130     2133       +3     
- Misses         2284     2289       +5     
- Partials        133      134       +1

Impacted Files	Coverage Δ	Complexity Δ
...ithub/integration/multibranch/GitHubSCMSource.java	2.04% <0%> (+0.04%)	0 <0> (ø)	⬇️
...ntegration/multibranch/GitHubParametersAction.java	27.27% <27.27%> (ø)	0 <0> (?)

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