Add more RAM to core pods
Add more RAM to core pods

I think #1746 is due to this, since grafana says
the datahub hub pod was constantly around 1G RAM,
and gave them a 'bad gateway' error

berkeley-dsep-infra/datahub,ryanlovett/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub