Rename junit.versino --> vespa.junit.version to avoid users overriding it
Rename junit.versino --> vespa.junit.version to avoid users overriding it

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa