Bump testcontainers from 1.14.3 to 1.15.0 (#62)

Bumps [testcontainers](https://github.com/testcontainers/testcontainers-java) from 1.14.3 to 1.15.0.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/master/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.14.3...1.15.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

clusterj-app/pom.xml

@@ -20,7 +20,7 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>testcontainers</artifactId>
-            <version>1.14.3</version>
+            <version>1.15.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>