Monitoring interceptor error in cp-all-in-one for 5.1.0-post

[ybyzek]

In #654, specifically this comment, @hpinsley discovered an issue with monitoring interceptors in ksql-datagen container.

ksql-datagen       | cp: cannot stat '/usr/share/java/monitoring-interceptors/monitoring-interceptors-5.1.0.jar': No such file or directory

The problem is that the version of the available monitoring-interceptors is still 5.0.0.jar because that is the base of the connect image, so 5.1.0.jar does not exist when copying from the volume shared with the connect image.

However, this is a moot point. The ksql-datagen image now includes the monitoring interceptors so there is no need to copy it over. So the real fix is to remove the copying over of the jar. Temporary workaround is to delete this line from your docker-compose.yml file: https://github.com/confluentinc/cp-docker-images/blob/5.1.0-post/examples/cp-all-in-one/docker-compose.yml#L162

[ybyzek]

Resolved by PR #665

cc: @hpinsley