Fixup repair route

* Do not allow scheduling tasks in error state
* Only repair is allowed in error state
* Use the error object to track what to 'repair' (like the lastState)
* If uninstall failed, repair will do uninstall
* If move dir failed, repair will do move dir

src/boxerror.js

@@ -46,6 +46,7 @@ BoxError.NETWORK_ERROR = 'Network Error';
 BoxError.NOT_FOUND = 'Not found';
 BoxError.REVERSEPROXY_ERROR = 'ReverseProxy Error';
 BoxError.TASK_ERROR = 'Task Error';
+BoxError.UNKNOWN_ERROR = 'Unknown Error'; // only used for porting
 
 BoxError.prototype.toPlainObject = function () {
     return _.extend({}, { message: this.message, reason: this.reason }, this.details);