Removed functionality of Share Migration relying on Manila Share
Service node, moved code to Data Service node for copy phase.
Added parameter 'notify' and share/api methods for future
implementation (see dependent patches).
Added new copy operation statuses, in order to implement future
API calls to obtain progress and cancel migration.
Added possibility of 2-phase migration for driver migration and
generic (fallback) migration.
Added admin export location support and removed approach of
replacing IP with config parameter.
Added Admin-only API entry points to:
- Migration Cancel (only during copying)
- Reset Task State field
- Migration Get Progress (only during copying)
- Migration Complete (2nd phase migration)
- Notify parameter on Migrate Share
APIImpact
DocImpact
Implements: blueprint data-service-migration
Change-Id: I1d65aac2f36942cd70eb214be561d59a15a4ba26