Adding git preCommit action

.github/workflows/maven.yml

@@ -0,0 +1,16 @@
+name: phoenix-connectors preCommit Build
+
+on: 
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Maven
+      run: mvn clean install