Feature request: Allow `openjd run` to run entire jobs regardless of step environments

[ddneilson]

Use Case

• I'm trying to develop a multi-step Job and want to test it end-to-end

Proposed Solution

• Relax the constraint on openjd run that prevents it from running dependent steps if any of the steps in the dependency chain have step environments defined.
  • This can be done within the same Session by exiting environments that have been entered for a Step before moving on to another Step.
• Allow the --step option of openjd cli to be optional, and if not provided then run the entire job in step-dependency order.

[mwiebe]

Fixed in #138