Initially setting wizard-ready to false breaks wizards

[jeff-phillips-18]

Console error:

angular.js:14199 TypeError: Cannot read property 'okToNavAway' of undefined
at angular.module.component.controller.ctrl.allowStepIndicatorClick (angular-patternfly.js:18365)
at fn0 (eval at compile (angular.js:15126), :4:707)
at expressionInputWatch (angular.js:16254)
at Scope.$digest (angular.js:17828)
at ChildScope.$apply (angular.js:18102)
at HTMLButtonElement. (angular.js:26597)
at HTMLButtonElement.dispatch (jquery.js:5206)
at HTMLButtonElement.elemData.handle (jquery.js:5014)

[jeff-phillips-18]

Fixed by #687