planet.Start starts a testplanet system, whereas planet.Run starts a testplanet
and runs a test against it with each DB backend (cockroach compat).
Change-Id: I39c9da26d9619ee69a2b718d24ab00271f9e9bc2
* add exit-status command
* remove todo and fix format
* fix status display
* change startExit to exit progress
* fix linting error
* add successful column in exit progress
* fix test
* remove extra new line
* fix TYPOS
* format the percentage better