Update Sonobi adapter for: config settings, floor, deals, unit tests

[Studnicky]

Significant update for Sonobi Adapter

• Associates request bid object with returned bid object (Set bid response ID to bid request ID #509)
• Allows deals (Launching Deals #404)
• Allows optional floor setting
• Creates fail bids for improper configs
• Accomodates for inconsitent adunit codes
• No longer errors when users confuse Sonobi placement id with DFP ad unit code
• No longer requires dom_id for unique identifier
• Backwards compatible with previous config settings

You will be unable to test deals without an internal tool that has been shared previously
(@mkendall07)

[Studnicky]

Example Configs for quick testing:

placement_id config style
https://gist.github.com/Studnicky/cfe80a0695621a0ca62996a82c6c6490
ad_unit config style
https://gist.github.com/Studnicky/d6f00d293173fe875ff46ca165ef6e8a

[jaiminpanchal27]

Verified. Looks good. Thanks @Studnicky