[YUNIKORN-1459] Use priority for application sorting

[craigcondit]

What is this PR for?

Use priority when sorting application requests.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-1459

How should this be tested?

Unit tests added.

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[codecov]

Codecov Report

Merging #484 (729a1e5) into master (56eb307) will increase coverage by 0.06%.
The diff coverage is 93.22%.

@@            Coverage Diff             @@
##           master     #484      +/-   ##
==========================================
+ Coverage   73.12%   73.18%   +0.06%     
==========================================
  Files          69       69              
  Lines       10455    10494      +39     
==========================================
+ Hits         7645     7680      +35     
- Misses       2558     2561       +3     
- Partials      252      253       +1     

Impacted Files	Coverage Δ
pkg/scheduler/objects/sorters.go	97.00% <93.10%> (-2.22%)	⬇️
pkg/scheduler/objects/queue.go	73.74% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[wilfred-s]

This probably needs a rebase before we proceed.
First look at the code all looks good, just waiting with the approval until we have rebased.

[craigcondit]

Rebased on latest master. Minor change to .golangci.yaml required to fix lint crashing with panic (seems related to the recent zap logger upgrade).

[manirajv06]

looks good.