chore(pipeline): add Groovy unit test as GH action (#1140)

* Create verify-groovy.yml

* correct indent

* correct indent

.github/workflows/verify-groovy.yml

@@ -0,0 +1,16 @@
+name: Groovy
+
+on: [push]
+
+jobs:
+  unit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: unit-test
+      run: mvn --batch-mode clean verify -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn