fix(keycloak): use version property for maven

Signed-off-by: Gaurav Mishra <[email protected]>

Author: GMishx

keycloak/event-listeners/pom.xml

@@ -72,7 +72,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-failsafe-plugin</artifactId>
-                    <version>3.5.4</version>
+                    <version>${maven-failsafe-plugin.version}</version>
                 </plugin>
             </plugins>
         </pluginManagement>