Tweaked relational query provider enumerators
Re-enabling problematic groupby tests
Revert "Re-enabling problematic groupby tests"

This reverts commit e04559811cf7c76030d86568de522bf94b776634.
Implemented the Northwind tests for Redis plus some tidying up (e.g. removed
BaseClassFixture since not really using it).
Updating to make UnderlyingType a metadata property
DbContext.Add should use sync path
Format JSON documents
Fixes test concurrency issue and some Redis FT inconsistencies.
Fixing test namespaces
Updated to use the new target framework in project.json
Update some #if statements that were missed
Grouping Inserts into a single statement in a batch
Improving batching perf by delaying the sql script building.
Add PathResolver to Design project and exclude tests using ANIs from net45