[10] Review request: 8186642: Assertion error if output application already exists

[victor . drozdov]

Kevin,

Please review the changes about fixing "AssertionError: Duplicate entry".

JIRA: https://bugs.openjdk.java.net/browse/JDK-8186642
Webrev: http://cr.openjdk.java.net/~vdrozdov/JDK-8186642/webrev.00/

--Victor