message: BF ConcurrencyControl.lockSchema was failing
  to set the required seedFile property of the Lock object
diff: @@ -201,6 +201,7 @@ export class ConcurrencyControl {
  lockType: LockType.Schemas,
  objectId: "0x1",
  briefcaseId: this._iModel.briefcase.briefcaseId,
  + seedFileId: this._iModel.briefcase.fileId,
  releasedWithChangeSet: this._iModel.briefcase.changeSetId,
  },
  ];
  