reverted float typecasting of gpstime for certian pipelines
some pipelines gave gpstimes in string format, which had to be casted into floats. This is fixed now (https://git.ligo.org/lscsoft/gracedb/issues/10), hence reverting that back.
some pipelines gave gpstimes in string format, which had to be casted into floats. This is fixed now (https://git.ligo.org/lscsoft/gracedb/issues/10), hence reverting that back.