Fiete

#### What this PR does This PR makes the curl image that is used for elasticsearch configurable and changes it to not use a `latest` tag: ```sh helm template --set...

Migrate RepositoryRestConfigurerAdapter to RepositoryRestConfigurer

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## What problem are you trying to solve? As part of the spring-boot (2.4) update, `spring-data-rest-webmvc` is updated to `3.4.X`. With this release, the deprecated `import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurerAdapter` is removed and...