Our current endpoints bail on us, if the column data is null. Thus we need
to take the intermediate step and set the default to a fixed value and
reset those with the following release.
It sets the default column value to our current config values of 50GB
for storage and bandwidth and 100 buckets, while still enabling the field to be nullable.
All 0 values are migrated to be the default as well to ensure they can
keep using their projects, as with the original change, 0 actually means 0.
Change-Id: I797be80ce2d2105091599dc1b3fc76f74336b66b
5f6fccc6e8