Disable Maven cache in GHA

Trying to invalidate it.

Author: acogoluegnes

.github/workflows/test-linux.yml

@@ -31,12 +31,12 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: '11'
-      - name: Cache Maven packages
-        uses: actions/cache@v2
-        with:
-          path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
+#      - name: Cache Maven packages
+#        uses: actions/cache@v2
+#        with:
+#          path: ~/.m2
+#          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+#          restore-keys: ${{ runner.os }}-m2
       - name: Enable MQTT and STOMP plugins
         run: docker exec ${{job.services.rabbitmq.id}} rabbitmq-plugins enable rabbitmq_mqtt rabbitmq_stomp
       - name: Test