* update acceptance test to fail
* update periodic vesting reset to reflect additive period lengths, not
absolute lengths
* simplify end time logic
* remove log
* test inclusion of v0_15 migration tests
* add auth test data
* add periodic vesting account migration
* assert owned coins are equal and unchanged during migration
* add script for generating test data from a genesis file
* remove commented import
* touch ups
* don't pretty print test data for auth module; update generate script to
use jq -c option
* fix typo in comment, improve clarity of assertions
* add context to migrate auth assertions
* add 180 days check for spendable coins
* asssertion context
* pr feedback - add assertions, touch up assertion msgs, and fix migration test to correctly
type assert pointer
