Switch to gh actions for CI

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Build
+
+on: [ pull_request ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Cache Maven packages
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+    - name: Build with Maven
+      run: mvn -s settings.xml clean install -Pintegration -Ppersistence-integration -DpreferIpv4 -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer=warn -B
+      env:
+        MAVEN_OPTS: "-Xms1524M -Xmx1524M"