CBQE-2121: implement CLI tests for Delta recovery

Change-Id: Ib4f01bdad3bcde7bbbfcdec5cd9c4ba0b7ff1269
Reviewed-on: http://review.couchbase.org/37043
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>