Bump org.apache.maven.plugins:maven-failsafe-plugin from 3.3.1 to 3.5.1

Bumps [org.apache.maven.plugins:maven-failsafe-plugin](https://github.com/apache/maven-surefire) from 3.3.1 to 3.5.1.
- [Release notes](https://github.com/apache/maven-surefire/releases)
- [Commits](https://github.com/apache/maven-surefire/compare/surefire-3.3.1...surefire-3.5.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-failsafe-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

apps/showcase/pom.xml

@@ -163,7 +163,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-failsafe-plugin</artifactId>
-                <version>3.3.1</version>
+                <version>3.5.1</version>
                 <configuration>
                     <includes>
                         <include>it.org.apache.struts2.showcase.*Test</include>