Move Envoy Common to common/ subdirectory

.github/workflows/maven.yml

@@ -1,17 +0,0 @@
-name: Java CI
-
-on: [push]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: Set up JDK 11
-      uses: actions/setup-java@v1
-      with:
-        java-version: 11
-    - name: Build with Maven
-      run: mvn -B package --file pom.xml