(PDB-3600) time migration execution
(PDB-3600) time migration execution

Time migrations and log them to make testing/support awareness easier.

rbrw/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb