Updating the Datera Cinder driver to version 2.3 and implemented the
following features:
- Added Datera EDF API 2.1 support
- Added dynamic API lookup
- Added Multi-Tenancy Support
- Added Template Support
- Broke driver up into modules. Moved API implementations into
their own modules for easier maintenance, created common
module for possible future drivers. Moved Datera driver
into datera/datera_iscsi.py module.
- Updated unit tests to test both API v2 and v2.1
DocImpact
UpgradeImpact
Change-Id: Id882583d7e5df6e41784affd4f74e2d0d117b18a
