Any person interested in any property assessed for such improvements, or against whom any charge of personal liability may have been fixed, may, within fifteen (15) days from the conclusion of the hearing above referred to, but not thereafter, institute suit in any court having jurisdiction for the purpose, on any ground, of testing the validity of said assessment or personal liability, and the validity of any proceeding had with reference thereto; but is said action be not brought within said period of fifteen (15) days, then said persons, their heirs, successors, assigns, or personal representative, shall be forever barred from asserting any defect in such proceedings or any invalidity in said assessment or charge of personal liability, in any action in which the same may thereafter be brought into question.
The said city and the contractor to whom the work of improvement may have been let, shall be made parties defendant to any suit brought under this section. When any suit has been brought under the terms of this section, the performance of any work may be suspended at the election of the city or the contractor until said suit is finally determined, provided that any writ of error or appeal from the judgment of the court in which said suit was brought shall be perfected within thirty (30) days from the adjournment of the term of the court of original jurisdiction at which final judgment shall thereafter be taken or sued out, but any such suit shall be entitled to precedence in all courts in this state, and any party may move in any court of an early hearing, and such cases shall, in all courts, be entitled to be advanced on the docket and speedily determined.