Merge pull request #1 in VNATION/volttron from upgrade_weatheragent t…

…o develop

* commit '420676221535152002df78def775604d9cf0f7f9':
  Added a test for the weatheragent
  Fixed so that both 2 and 3 agents can call the code through the compat layer
  Removed older config files from the weather agent directory.
  Renamed weather config file
  Added the new key to the configuration file
  Made lines smaller to be like pylint compliant.
  Add weather topic to topics.py.
  Initial commit of updated weather agent (3.x).