astakos: Replace decimal field with bigint
Any values that happen to be greater than the new max (2**63-1)are reduced to this value.
quotaholder: Revert migration of log timestamps
Because migrating the timestamp fields of model ProvisionLog from stringto datetime takes too long, we keep them in string format.
Alter migrations 0005 through 0007 introduced in commit 164e64d.
quotaholder: Store timestamps using DateTimeField
Add new fields issue_datetime in Commission and issue_datetime,log_datetime in ProvisionLog. Migrate away from custom string-basedissue_time and log_time fields.
quotaholder: Add migrations
Migration 0001 should be faked on an existing database.Migration 0002 adds new fields.Migration 0003 populates the new fields based on the old ones.Migration 0004 deletes unneeded fields and tables.