Update dependency org.apache.maven.plugins:maven-failsafe-plugin to v3.5.6

Author: renovate[bot]

artemis-java-template/pom.xml

@@ -267,7 +267,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-failsafe-plugin</artifactId>
-                <version>3.5.3</version>
+                <version>3.5.6</version>
             </plugin>
             <plugin>
                 <artifactId>maven-resources-plugin</artifactId>