display times in rails configured timezone #435

testbed now has a (non-utc) timezone by default so that the model data
is different from the database and this functionality is covered by
rspec, cucumber.

fixes bug in datetime, where afternoon times are recording as
morning. This was already implemented in cases, see
https://code.bioinformatics.northwestern.edu/issues/issues/show/3415
bugfix, make roman time optional #435
move testbed timezone to Rakefile #435

Set the testbed timezone in the Rakefile so as not to unnecessarily
interfere with generators used for production.
Merge branch '435_times_in_rails_timezone'. Closes #435.

* 435_times_in_rails_timezone:
  move testbed timezone to Rakefile #435
  bugfix, make roman time optional #435
  display times in rails configured timezone #435
recording changes