[MINVOKER-229] Add a property in invoker.properties to check the failed mojo

**[Romain Manni-Bucau](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=romain.manni-bucau)** opened **[MINVOKER-229](https://issues.apache.org/jira/browse/MINVOKER-229?redirect=false)** and commented

using invoker.buildResult = failure we can check a plugin failed but there is no property to also check which mojo failed.

Issue is you can pass a test where the build failed for another reason than the expected one.

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No further details from [MINVOKER-229](https://issues.apache.org/jira/browse/MINVOKER-229?redirect=false)

Start by locating how invoker.properties is read and how invoker.buildResult evaluates a failed build. Determine how a property could identify the failed mojo and distinguish the expected failure from unrelated build errors; done means invoker tests can reject a failure caused by the wrong mojo.

Written by the indexing model from the issue text.