[SR] Add basic CLI for SyncWrite requests
[SR] Add basic CLI for SyncWrite requests

Add sync_repl.py; a basic command-line interface to making Synchronous
Replication requests.

Example usage - to perform a set with durability requirements to key
'test' setting its value to 'XXX':

    ./sync_repl.py localhost:12000 Administrator asdasd default setD test XXX

Change-Id: Ie54fdc8151b11e53bbbe360b0363790a9cdd5889
Reviewed-on: http://review.couchbase.org/103444
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Reviewed-by: Paolo Cocchi <9dd88c9f3e5cbab6e19a6c020f107e0c648ac956@couchbase.com>
Tested-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine