Convert deferred_delete v3 plugin to v2.1 API

Changes required to have v3 plugin natively support the V2.1
API

The force_delete action is reverted back to forceDelete

Partially implements blueprint v2-on-v3-api

Change-Id: I0b050d3328338923cf05521b9ef5cc3b1c50a586
Merge "Convert deferred_delete v3 plugin to v2.1 API"