updded mongo limit to 2g to give best chance of running on a 8g local machine
updded mongo limit to 2g to give best chance of running on a 8g local machine

EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4,EBIBioSamples/biosamples-v4