BIND 10 #2754: bindctl config validation should print the configuration path that created an error

[BIND 10 Development]

#2754: bindctl config validation should print the configuration path that created
an error
-------------------------------------+-------------------------------------
            Reporter:  cas           |                         Type:
              Status:  new           |  defect
           Milestone:  New Tasks     |                     Priority:
            Keywords:                |  medium
           Sensitive:  0             |                    Component:
         Sub-Project:  DNS           |  Unclassified
Estimated Difficulty:  0             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 After a long editing session, I want to commit the config and I get
 {{{
 > config commit
 Error: Error in config validation: Unknown item filetype
 Configuration not committed
 }}}

 as a user, I have no idea where this error occurs, there is no context.

 The error message should print the config reference (path) where the error
 occurs

 This is 1.0.0-rc

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Ticket URL: <http://bind10.isc.org/ticket/2754>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development