Akron Children’s Hospital was overflowing Monday with hundreds of job seekers who want to work at the growing pediatric facility.An hour before the hospital’s career fair opened at 9 a.m., eager job applicants already were lining up to interview for positions being created by opening this spring of a new seven-story building on the main downtown campus.“This is more than we anticipated,” said Walt Schwoeble, Children’s vice president for human resources.