* refact: Changes required for gorm v2
* refact: Add db.DB wrapper and refact all test fixtures to use it
Stop leaking the gorm abstraction within our unit tests.
* refact: Migrate direct calls to pq to pgx driver
The refactor will remove the remaining direct dependencies on
the pq driver which has been deprecated in favor of the pgx
driver.
It includes the addition of common.SqlOpen which is a wrapper around
sql.Open, which is needed to deal with the driver name changing from
"postgres" to "pgx" but in our code base the dialect and driver are
synonyms.
* Adds job repo
* Adds scheduler
* Adds plugin table which is a place holder for future expansion of the scheduler. Currently all jobs that are created are linked to the pi_system plugin which are jobs that are held in a local registeredJobs map populated at controller startup.
Jim
Louis RuchandMichael Gaffney
Jeff Mitchell