Insert spring-webmvc dependency with test scope to make tests running

Signed-off-by: Ammar Bikic <ammar.bikic@bosch.io>

hawkbit-rest/hawkbit-mgmt-api/pom.xml

@@ -24,6 +24,11 @@
          <groupId>org.springframework.hateoas</groupId>
          <artifactId>spring-hateoas</artifactId>
       </dependency>
+      <dependency>
+         <groupId>org.springframework</groupId>
+         <artifactId>spring-webmvc</artifactId>
+         <scope>test</scope>
+      </dependency>
       <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-json</artifactId>