Refactor ci/cleanupArtifacts.sh to clean (remove) the Gradle build/ [and Maven target/] directories.

Author: jxblum

ci/cleanupArtifacts.sh

@@ -2,4 +2,6 @@
 
 rm -Rf ./.gradle
 rm -Rf ./.m2
+rm -Rf `find . -name "build" | grep -v "src"`
+rm -Rf `find . -name "target" | grep -v "src"`
 exit 0