Kevin,Please review my changes for fixing the issue: "JDK-8194144: com.oracle.tools.packager.Bundler.execute() returns null on MAC"
JIRA: https://bugs.openjdk.java.net/browse/JDK-8194144 Webrev: http://cr.openjdk.java.net/~vdrozdov/JDK-8194144/webrev.00/ --Victor
