Honeycomb setup and utils

Honeycomb setup and utils

- re-implement HTTPCodes as IntEnum rather then dictionary
- add methods to manipulate data using honeycomb - get, set, delete
- change the name of url file from vpp_version.url to oper_vpp_version.url
- improve checking of startup and shutdown state of honeycomb
- PEP8 fixes
- add docstrings in all modules and classes
- move logging to the lowest possible level
- improve logging in exceptions
- add method exec_command_sudo_log to resources.libraries.python.ssh module

Change-Id: I54e0c6b45313e3a3c11bafa475488ae2b1e605c2
Signed-off-by: Tibor Frank <tifrank@cisco.com>