Add controller unit tests and test dependencies

pom.xml

@@ -61,6 +61,11 @@
       <artifactId>lombok</artifactId>
       <optional>true</optional>
     </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-test</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>