message: Fix provisioner error messages
diff: @@ -645,7 +645,7 @@ Provisioner.prototype.queryLink = Promise.coroutine(function*(req) {
  catch (err) {
  if (err._validationErrors) {
  let s = err._validationErrors.map((e)=>{
  - return `${e.instanceContext} is malformed`;
  + return `${e.field} is malformed`;
  }).join(', ');
  throw new Error(s);
  }
  @@ -717,7 +717,7 @@ Provisioner.prototype.requestLink = Promise.coroutine(function*(req) {
  catch (err) {
  if (err._validationErrors) {
  let s = err._validationErrors.map((e)=>{
  - return `${e.instanceContext} is malformed`;
  + return `${e.field} is malformed`;
  }).join(', ');
  throw new Error(s);
  }
  