[Backport 2.16] Adds release notes for 2.16 (#844) #1352

	name: Test neural-search on Secure Cluster
	on:
	schedule:
	- cron: '0 0 * * *' # every night
	push:
	branches:
	- "*"
	- "feature/**"
	pull_request:
	branches:
	- "*"
	- "feature/**"
	env:
	ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true

	jobs:
	Get-CI-Image-Tag:
	uses: opensearch-project/opensearch-build/.github/workflows/get-ci-image-tag.yml@main
	with:
	product: opensearch

	integ-test-with-security-linux:
	strategy:
	matrix:
	java: [11, 17, 21]

	name: Run Integration Tests on Linux
	runs-on: ubuntu-latest
	needs: Get-CI-Image-Tag
	container:
	# using the same image which is used by opensearch-build team to build the OpenSearch Distribution
	# this image tag is subject to change as more dependencies and updates will arrive over time
	image: ${{ needs.Get-CI-Image-Tag.outputs.ci-image-version-linux }}
	# need to switch to root so that github actions can install runner binary on container without permission issues.
	options: --user root

	steps:
	- name: Checkout neural-search
	uses: actions/checkout@v1
	with:
	submodules: true

	- name: Setup Java ${{ matrix.java }}
	uses: actions/setup-java@v1
	with:
	java-version: ${{ matrix.java }}

	- name: Run tests
	# switching the user, as OpenSearch cluster can only be started as root/Administrator on linux-deb/linux-rpm/windows-zip.
	run: \|
	chown -R 1000:1000 `pwd`
	su `id -un 1000` -c "whoami && java -version && ./gradlew integTest -Dsecurity.enabled=true"

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