unify resources

[casperdcl]

Right now, functionality added to TPI resource_runner (to support CML) needs to be duplicated/separately added to TPI resource_task (for TPI task) and TPI resource_machine (for who-knows-what).

It's better to use the same code for all 3 resources:

• resource_task (used by public CLI)
• resource_runner (used by internal CLI for CML)
• resource_machine (used by ??)

Either:

1. make the above resources share more golang code (abstract common functionality into one place common.go & make them all use said common functionality),
2. Or deprecate 2 of the above resources

[DavidGOrtega]

@casperdcl I do not fully understand the issue.
Do you mean that we have to expose task and machine resources within the cml CLI?

[casperdcl]

Updated description. Clearer now?