slf4j version

[maihacke]

devon4j-bom currently contains a dependencymanagement for slf4j:

      <!-- Logging API -->
      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.7</version>
      </dependency>

in devon4j-logging we include jcl-over-slf4j. There is no dependency management for this dependency in devon4j-bom. Currently jcl-over-slf4j is resolved to version 1.7.28.

When looking at the new kafka module @ravicm2 is currently working on I ran into a problem with kafka in junit tests. The embedded kafka implementation expects slf4j 1.7.28, so I got a ClassNotFoundException for org.slf4j.event.Level.

The current slf4j version is 1.7.30.

We should think about which version of slf4j to include and assure this jcl-over-slf4j is also managed.

[maihacke]

@ravicm2 You will notice that I included part of that change in your kafka-branch e.g. my PR.

[hohwille]

Done with PR #205