Bug Fix: Missing Datacenter from context

- Datacenter is specified via the Configuration and set to Deuce Context
Bug Fix

- Datacenter must be all lowercase as that is how it is compared; better to do this once when we load it from the config than every time we compare
- Added tests for Deuce Context to validate that it works, and validate that it properly handles the datacenter regardless of how user enters it in config
Merge pull request #186 from BenjamenMeyer/bugfix_context_datacenter

Bug Fix: Missing Datacenter from context