[CYB-207] add junit dependency

Author: cduby

flink-cyber/flink-enrichment/flink-enrichment-lookup-rest/pom.xml

@@ -123,6 +123,10 @@
             <version>${global.httpclient.version}</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.mock-server</groupId>
             <artifactId>mockserver-netty</artifactId>