Use save() from Storage to save changes to database
Use save() from Storage to save changes to database

Save is needed after operations that change state of database:
* setting policies;
* updating or inserting a bucket;
* removing bucket.

Change-Id: If1eea5cbbc0b8144d3ce9786fa4cbe8c858b9893

pohly/cynara,pohly/cynara,pohly/cynara,Samsung/cynara,Samsung/cynara,Samsung/cynara