improve version incompatibility error message

[Wouter1]

If some component is using the wrong EIS version you now get this

....
Caused by: java.io.IOException: Loaded environment interface version does not match the required one "0.3" vs. "0.4"
    at eis.EILoader.fromJarFile(EILoader.java:90)
    at goal.core.runtime.service.environment.EnvironmentService.launchLocalMessaginEnvironment(EnvironmentService.java:276)
    ... 45 more

From this message it is not clear who is expecting what. What was GOAL looking for? What was the env using? You can guess that GOAL is on 0.4 and the env on 0.3 in this case but that's just because I know that we have GOAL on 0.4 at this moment. The message should not require guessing IMHO