updated workflow actions, including Java 17 #17

	# DSpace Replication Task Suite Continuous Integration/Build via GitHub Actions
	name: Build

	# Run this Build for all pushes / PRs to current branch
	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	env:
	# Give Maven 1GB of memory to work with
	# Suppress all Maven "downloading" messages in build logs (see https://stackoverflow.com/a/35653426)
	# This also slightly speeds builds, as there is less logging
	MAVEN_OPTS: "-Xmx1024M -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn"
	steps:
	# https://github.com/actions/checkout
	- name: Checkout codebase
	uses: actions/checkout@v4

	# https://github.com/actions/setup-java
	- name: Install JDK 17
	uses: actions/setup-java@v4
	with:
	distribution: 'temurin'
	java-version: 17
	cache: 'maven'

	# https://github.com/actions/cache
	- name: Cache Maven dependencies
	uses: actions/cache@v4
	with:
	# Cache entire ~/.m2/repository
	path: ~/.m2/repository
	# Cache key is hash of all pom.xml files. Therefore any changes to POMs will invalidate cache
	key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
	restore-keys: ${{ runner.os }}-maven-

	- name: Build with Maven
	run: mvn -B -V clean verify

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