[MSHADE-397] Fix the test related to MSHADE-340

[nielsbasjes]

With the merge request apache/maven#483 in place the MSHADE-340 test fails.

This very small change fixes this problem.

With this in place the build passes mvn clean verify -Prun-its with both maven 3.8.1 and maven with apache/maven#483 in place.

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[nielsbasjes]

@michael-o I have pulled the fix for the MSHADE-340 test to this separate merge request.
Related to #26 and apache/maven#483