Add missing license header

[willyborankin]

Description

Added missing license header for some files.

Check List

• New functionality includes testing
• New functionality has been documented
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[willyborankin]

PR depends on #3463 will re-base it asap after it has been merged
rebased

[codecov]

Codecov Report

Merging #3467 (3d30564) into main (f435c05) will increase coverage by 0.03%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #3467      +/-   ##
============================================
+ Coverage     64.58%   64.62%   +0.03%     
- Complexity     3575     3576       +1     
============================================
  Files           275      275              
  Lines         20451    20451              
  Branches       3382     3382              
============================================
+ Hits          13208    13216       +8     
+ Misses         5546     5538       -8     
  Partials       1697     1697              

Files	Coverage Δ
...curity/dlic/rest/validation/EndpointValidator.java	94.20% <ø> (ø)

... and 6 files with indirect coverage changes

[reta]

@willyborankin needs rebase?

[cwperks]

@willyborankin Can you file an issue to run a license checker as part of the CI?

If I remember correctly, core does this in the precommit.

[willyborankin]

@willyborankin Can you file an issue to run a license checker as part of the CI?

If I remember correctly, core does this in the precommit.

Yes that's why I found the problem precommit verifies license.

[willyborankin]

Created an issue #3471

[willyborankin]

@reta Hmmm I rebased it still fails.

[reta]

@reta Hmmm I rebased it still fails.

Ah ... it is for 2.x

> Task :compileJava
/home/runner/work/security/security/2.x/src/main/java/org/opensearch/security/ssl/OpenSearchSecuritySSLPlugin.java:311: error: method does not override or implement a method from a supertype
    @Override
    ^
/home/runner/work/security/security/2.x/src/main/java/org/opensearch/security/ssl/transport/SecuritySSLNettyTransport.java:87: error: constructor Netty4Transport in class Netty4Transport cannot be applied to given types;
        super(
        ^
  required: Settings,Version,ThreadPool,NetworkService,PageCacheRecycler,NamedWriteableRegistry,CircuitBreakerService,SharedGroupFactory,Tracer
  found: Settings,Version,ThreadPool,NetworkService,PageCacheRecycler,NamedWriteableRegistry,CircuitBreakerService,SharedGroupFactory
  reason: actual and formal argument lists differ in length
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
2 errors

#3468
#3469

[willyborankin]

Finally the pipeline works just fine.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/security/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/security/backport-2.x
# Create a new branch
git switch --create backport/backport-3467-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 fb82bbbfcc133fa4ae0bba227c881f7a6ebbe7bd
# Push it to GitHub
git push --set-upstream origin backport/backport-3467-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/security/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-3467-to-2.x.

[opensearch-trigger-bot]

The backport to 2.11 failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/security/backport-2.11 2.11
# Navigate to the new working tree
pushd ../.worktrees/security/backport-2.11
# Create a new branch
git switch --create backport/backport-3467-to-2.11
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 fb82bbbfcc133fa4ae0bba227c881f7a6ebbe7bd
# Push it to GitHub
git push --set-upstream origin backport/backport-3467-to-2.11
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/security/backport-2.11

Then, create a pull request where the base branch is 2.11 and the compare/head branch is backport/backport-3467-to-2.11.