Add ability to name an import job

**Is your feature request related to a problem? Please describe.**
Currently, all import job is named "feastimport...", it is hard for user to know which one they submitted.

**Describe the solution you'd like**
Add "--name [job_name]" to CLI so that user is able to name their import job. 

**Describe alternatives you've considered**
N.A.

**Additional context**
N.A.