CBD-798: Revise based on review meeting
CBD-798: Revise based on review meeting

1. Redesign REST api for recovery
   - beginRecovery
   - commitVbucketRecovery
   - endRecovery
   - abortRecovery

Change-Id: I382d934b85a61c6d8ed45f440aa671a1d908f91f

couchbaselabs/couchbase-cli,couchbase/couchbase-cli,couchbase/couchbase-cli,couchbaselabs/couchbase-cli,couchbaselabs/couchbase-cli