Reading an FHD calibration strips whitespace from antenna names

[theo-kunicki]

using uvcal.read_fhd_cal() produces a uvcal object which has stripped the whitespace from antenna names. Producing a uvdata object from, say, reading a .uvfits file corresponding to the same observation does not. This leads to an error when trying utils.uvcalibrate().

Reading in the fhd calibration should not strip whitespace from antenna names for consistency.