Github Action Cache should be unique for all pull requests

Author: rohanKanojia

.github/workflows/e2e-tests.yml

@@ -39,7 +39,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.m2/repository
-          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}-${{ github.head_ref }}
           restore-keys: ${{ runner.os }}-maven-
       - name: Install Kubernetes Client
         run: mvn -f pom.xml -B -DskipTests clean install
@@ -66,7 +66,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.m2/repository
-          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}-${{ github.head_ref }}
           restore-keys: ${{ runner.os }}-maven-
       - name: Setup Java 8
         uses: actions/setup-java@v1
@@ -96,7 +96,7 @@ jobs:
         uses: actions/cache@v1
         with:
           path: ~/.m2/repository
-          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}-${{ github.head_ref }}
           restore-keys: ${{ runner.os }}-maven-
       - name: Setup Java 8
         uses: actions/setup-java@v1