Add hash generation to migration file

[Ed McDonagh]

Current migration file for upgrades doesn't know about the hash versions of each variable in the unique names table

[Ed McDonagh]

See e99ae333ae8a0d

[Ed McDonagh]

Added hash related code to the upgrade migration file. @dplatten - am I allowed to simply import remapp functions like this? Does this look like it would work? Refs#288

→ <<cset e99ae333ae8a>>

[Ed McDonagh]

Attempt to capture all the changed fields to make the migration file for 0.6 to 0.7 upgrade. Refs #288, #290

→ <<cset edef61d4ed2e>>

[Ed McDonagh]

Added @dplatten's populate_study_workload_chart_time and populate_unique_equipment_names functions to the automatically generated migration from a 0.6 database to a 0.7 database. Ignored PostgreSQL median for now. Refs #288, #290

→ <<cset ddfeab318c5c>>

[Ed McDonagh]

This has been tested in the latest migration file that deals with all the new tables, and it works.