Add back test scope to spring-boot-starter-web (prometheus#275)

Author: atrepczik

simpleclient_spring_boot/pom.xml

@@ -103,6 +103,7 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
             <version>1.5.4.RELEASE</version>
+            <scope>test</scope>
         </dependency>
     </dependencies>
 </project>