Not including tests on jac run

[ypkang]

Is your feature request related to a problem? Please describe.

It seems that *.test.jac are included in the code gen process during jac run. This could add additional latency to the program start up time if there are many tests code.

Describe the solution you'd like

Perhaps an option/flag to disable the inclusion of tests for jac run and jac enter.

Describe alternatives you've considered