Kylo file sampling upload should forward parse exception messages to user.

Description

The specific error is related to specifying the file included a header when it did. This JIRA ISSUE relates to the fact that the UI doesn't present the parse exception to the user, forcing the user to go to the log files to find something easily correctable from the UI.
```2017-04-03 21:31:53 ERROR http-nio-8420-exec-6:BaseExceptionMapper:46 - toResponse() caught Exception: java.lang.IllegalArgumentException, The header contains a duplicate name: "0" in [Aaban, , 0, 0, 1, 864]
java.lang.IllegalArgumentException: The header contains a duplicate name: "0" in [Aaban, , 0, 0, 1, 864]```

Environment

None

Assignee

Jagrut Sharma

Reporter

Douglas Moore

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Fix versions

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Priority

High
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