MongoDB guide sample application broken

[graemerocher]

The MongoDB guide doesn't have the test resources plugin added and configured correctly so tests fail out of the box.

Steps to reproduce

1. Download https://guides.micronaut.io/latest/micronaut-data-mongodb-asynchronous-gradle-java.html
2. Run tests (broken)
3. Add id("io.micronaut.test-resources") version "3.7.8" to build
4. Run tests (still broken with Read Timeout exception)
5. Add

micronaut:
  application:
    name: micronautguide
  http:
    client:
      read-timeout: 10s

and

micronaut {
   ...
    testResources {
        clientTimeout = 360
    }
}

Now passing.