[YUNIKORN-789] Add NOTICE and DISCLAIMER files to all yunikorn repos

[kobe860219]

What is this PR for?

Add NOTICE and DISCLAIMER files to repo

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-789

How should this be tested?

https://github.com/apache/incubator-yunikorn-core/pull/315/checks?check_run_id=3428521996

Screenshots (if appropriate)

Questions:

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

[codecov]

Codecov Report

Merging #315 (892695f) into master (5a1c19e) will increase coverage by 2.84%.
The diff coverage is 67.29%.

@@            Coverage Diff             @@
##           master     #315      +/-   ##
==========================================
+ Coverage   63.46%   66.31%   +2.84%     
==========================================
  Files          60       62       +2     
  Lines        5220     5810     +590     
==========================================
+ Hits         3313     3853     +540     
- Misses       1747     1755       +8     
- Partials      160      202      +42     

Impacted Files	Coverage Δ
pkg/common/utils.go	77.50% <0.00%> (ø)
pkg/metrics/init.go	62.96% <ø> (ø)
pkg/scheduler/nodes_usage_monitor.go	0.00% <0.00%> (ø)
pkg/scheduler/objects/allocation.go	85.18% <ø> (-14.82%)	⬇️
pkg/webservice/webservice.go	32.25% <ø> (+19.35%)	⬆️
pkg/scheduler/context.go	16.10% <23.33%> (+9.84%)	⬆️
pkg/metrics/metrics_collector.go	64.51% <45.00%> (-9.40%)	⬇️
pkg/metrics/scheduler.go	58.92% <49.33%> (-2.66%)	⬇️
pkg/scheduler/partition_manager.go	20.00% <50.00%> (ø)
pkg/scheduler/objects/template/template.go	64.10% <64.10%> (ø)
... and 24 more

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[HuangTing-Yao]

LGTM