Excluse android json from spring-boot-starter-test, #267. (#284)

Excluse android json from spring-boot-starter-test, fix #267.

pom.xml

@@ -172,6 +172,12 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <version>${spring.boot.starter.test.version}</version>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.vaadin.external.google</groupId>
+                    <artifactId>android-json</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>