ATS-223: ATS: T-Engines: fix warning for duplicate org.json.JSONObject on classpath

- noticed when running "mvn clean install"
- exclude "android-json-0.0.20131108.vaadin1.jar" (rather than "json-20160212.jar") for "spring-boot-starter-test"

alfresco-docker-alfresco-pdf-renderer/pom.xml

@@ -38,6 +38,12 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.vaadin.external.google</groupId>
+                    <artifactId>android-json</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.alfresco</groupId>