adding transitive dependency to make enforcer plugin happy

Author: etirelli

kie-dmn/kie-dmn-core/pom.xml

@@ -64,6 +64,10 @@
       <groupId>org.drools</groupId>
       <artifactId>drools-compiler</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
 
     <dependency>
       <groupId>junit</groupId>