Update temporary elastic search migration script to use async=False to avoid overloading celery queue.
Update temporary elastic search migration script to use async=False to avoid overloading celery queue.

- Add progress bar.

baylee-d/osf.io,cslzchen/osf.io,mfraezz/osf.io,cslzchen/osf.io,pattisdr/osf.io,CenterForOpenScience/osf.io,mfraezz/osf.io,mfraezz/osf.io,adlius/osf.io,mfraezz/osf.io,CenterForOpenScience/osf.io,Johnetordoff/osf.io,saradbowman/osf.io,saradbowman/osf.io,brianjgeiger/osf.io,CenterForOpenScience/osf.io,felliott/osf.io,baylee-d/osf.io,Johnetordoff/osf.io,baylee-d/osf.io,cslzchen/osf.io,Johnetordoff/osf.io,aaxelb/osf.io,brianjgeiger/osf.io,pattisdr/osf.io,adlius/osf.io,adlius/osf.io,felliott/osf.io,aaxelb/osf.io,felliott/osf.io,CenterForOpenScience/osf.io,brianjgeiger/osf.io,Johnetordoff/osf.io,aaxelb/osf.io,pattisdr/osf.io,cslzchen/osf.io,aaxelb/osf.io,mattclark/osf.io,brianjgeiger/osf.io,felliott/osf.io,mattclark/osf.io,adlius/osf.io,mattclark/osf.io