Fix an invalid test in the storage test suite

The test_by_user_period test is looking for the first
result set to come back with the wrong timestampe, and
not noticing that most of the test isn't even being
run. Be more explicit about the expected results.

Change-Id: I47e7699c877819d98f66d47dc85662f26767abd6
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Merge "Fix an invalid test in the storage test suite"