Bump testcontainers from 1.15.1 to 1.15.2 (#72)

Bumps [testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.15.1 to 1.15.2.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/master/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.15.1...1.15.2)

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Author: dependabot-preview[bot]

clusterj-app/pom.xml

@@ -20,7 +20,7 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
-            <version>1.15.1</version>
+            <version>1.15.2</version>
             <scope>test</scope>
         </dependency>
         <dependency>