[#71859240] User can import data within a Pg database

 - import into a new table
 - imports within a postgres database use the basic TableCopier
[#71859240] User can import a pg dataset into an existing pg table

 - Dataset importability rules are the same as existing
[#72893182] Fix handling for rake task args

 - Rake 10.3.2 has different argument parsing behavior from 10.1.1
 - See: https://github.com/jimweirich/rake/pull/279
additional integration tests
--Added integration tests for Jobs feature
--Added create a milestone test for the milestone feature
-Fix integration tests