Update variable names to Go convention + Simplify map lookups #2633

	name: Integration

	on:
	schedule:
	- cron: '0 1 * * *'
	push:
	branches:
	- github-actions
	- main
	- "8.12"
	- "8.13"
	- "7.17"
	pull_request:
	branches:
	- main
	- "8.12"
	- "8.13"
	- "7.17"

	env:
	GITHUB_ACTIONS: true
	ELASTICSEARCH_VERSION: elasticsearch:8.3.0-SNAPSHOT

	jobs:
	test-integration:
	name: Tests
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with: { fetch-depth: 1 }
	- uses: actions/setup-go@v2.1.3
	with: { go-version: '1.x' }
	- run: go version
	- run: make test-integ race=true
	- uses: codecov/codecov-action@v1
	with:
	file: tmp/integration-client.cov
	flags: integration

	examples:
	name: Examples
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with: { fetch-depth: 1 }
	- uses: actions/setup-go@v2.1.3
	with: { go-version: '1.x' }
	- run: go version
	- name: Increase system limits
	run: \|
	sudo swapoff -a
	sudo sysctl -w vm.swappiness=1
	sudo sysctl -w fs.file-max=262144
	sudo sysctl -w vm.max_map_count=262144
	- name: Launch Elasticsearch
	run: \|
	docker pull --quiet docker.elastic.co/elasticsearch/${{ env.ELASTICSEARCH_VERSION }}
	docker pull --quiet appropriate/curl
	make cluster-clean cluster-update cluster detach=true version="${{ env.ELASTICSEARCH_VERSION }}"
	- name: Run setup
	run: \|
	cd _examples/encoding && make setup
	env:
	GOBIN: ${{ env.GOROOT }}/bin
	- run: make test-examples

Provide feedback