Bump org.springframework:spring-webmvc in /samples/Maven POM/filenames

Bumps [org.springframework:spring-webmvc](https://github.com/spring-projects/spring-framework) from 4.2.7.RELEASE to 4.2.9.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.2.7.RELEASE...v4.2.9.RELEASE)

---
updated-dependencies:
- dependency-name: org.springframework:spring-webmvc
  dependency-type: direct:production
...

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

samples/Maven POM/filenames/pom.xml

@@ -19,7 +19,7 @@
 		<slf4j.version>1.7.7</slf4j.version>
 		<log4j.version>1.2.17</log4j.version>
 
-		<spring.version>4.2.7.RELEASE</spring.version>
+		<spring.version>4.2.9.RELEASE</spring.version>
 		<spring.data.jpa.version>1.6.0.RELEASE</spring.data.jpa.version>
 		<cglib.version>2.1_3</cglib.version>