Support Dataclass as a process container for process model discovery.

[bamsumit]

Objective of issue:
Support Dataclass as a process container for process model discovery for easy creation of hierarchical processes.

Lava version:

• 0.5.0 (feature release)
• 0.4.1 (bug fixes)
• 0.4.0 (current version)
• 0.3.0
• 0.1.2

I'm submitting a ...

• bug report
• feature request
• documentation request

Current behavior:

Expected behavior:

Steps to reproduce:

Related code:

insert short code snippets here

Other information:

insert the output from lava debug here

[bamsumit]

This should probably be looked at together with the default build functionality for the hierarchical process.

[bamsumit]

#372

[tim-shea]

@GaboFGuerra @bamsumit what is the current status of this issue?