Method get_deckhand_validation_status was miss-addressing
_get_deckhand_validation_errors vs _get_deckhand_validations
which was recently renamed.
Updates the drydock operator to use an auth_gen mehtod to generate
authorization headers instead of a direct passing of auth token.
Change-Id: I1647cde004d2d111b15abc9e5d69413568ad7b34