Drop log level back to INFO
Exclude paramiko module from logging
Remove extra AUDIT line.

- Once token is created a more complete AUDIT line is generated. Besides, only because the user
is recognized does not mean that the token was created therefore this AUDIT line is itself misleading.
Drop down log level of line to debug.
Drop down level of line to debug.
Add ObjectId to json unfriendly list.
Human friendly logging.

- pretty printing the json to help with reading.
- including the result of an action as output.
In case of error log the pecan request to help with debugging for /webhooks.
Merge pull request #896 from StackStorm/st2action-logging

St2action logging changes.