Using const values does not set the expected value when validation fails

[jpettit]

See this example where the validation failed because it was expecting "environment" to be equal to 'foobar'. The report displays the expected value as undefined when it should be foobar.

 Message: Response body is invalid: environment should be equal to constant

  Actual value: local

  Expected value: undefined

  Property: validate.body.properties.environment.const

  JSON schema:
    const: foobar

[jpettit]

This was using json schema 6

[ehmicky]

That's because JSON schema v6 is not supported (see #6).