fix maven_version_number (scalaVersion) again

Author: adriaanm

scripts/jobs/validate/test

@@ -9,9 +9,9 @@ case $prDryRun in
 
     # build quick using STARR built upstream, as specified by maven_version_number
     # (in that sense it's locker, since it was built with starr by that upstream job)
-    ant -Dstarr.version=$maven_version_number \
+    ant -Dstarr.version=$scalaVersion \
        -Dscalac.args.optimise=-optimise \
        -Dlocker.skip=1 -Dstarr.use.released=1 -Dextra.repo.url=$prRepoUrl \
        $testExtraArgs ${testTarget-test.core docs.done}
     ;;
-esac
+esac