Bump groovy-all from 2.0.8 to 2.4.15

Bumps [groovy-all](https://github.com/apache/groovy) from 2.0.8 to 2.4.15.
- [Release notes](https://github.com/apache/groovy/releases)
- [Commits](https://github.com/apache/groovy/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

pom.xml

@@ -499,7 +499,7 @@
 		<gmavenplus.plugin.version>1.5</gmavenplus.plugin.version>
 
 		<!-- Redefine default value from spring-boot-dependencies (https://github.com/spring-projects/spring-boot/blob/v1.5.16.RELEASE/spring-boot-dependencies/pom.xml) -->
-		<groovy.version>2.0.8</groovy.version>
+		<groovy.version>2.4.15</groovy.version>
 
 		<!-- Redefine default value from spring-boot-dependencies (https://github.com/spring-projects/spring-boot/blob/v1.5.16.RELEASE/spring-boot-dependencies/pom.xml) -->
 		<h2.version>1.4.197</h2.version>