should pephubclient become part of peppy to simplify things?

[khoroshevskyi]

In my opinion, pephubclient shouldn't be part of peppy. 1) It will be harder to maintain these two things. 2) I want to avoid recursive dependency.

[nsheff]

after some discussion in infrastructure, we think it might make sense to:

• bring pephubclient into peppy as a submodule
• bring eido back into peppy as a submodule
• leave pepdbagent outside of peppy