cbimport does not handle MONO_INCR starting at non-default value

Problem
cbimport does not handle MONO_INCR starting at non-default value, the follow error is produce

JSON import failed: unable to parse MONO_INCR start point [100

Steps to reproduce

1. Create the test file:

   people.json
   {"id": 1001,"name": "prasad","type":"employee","division": "Couchbase Cloud","manager": false,"salary": 1000.20,"office": "Santa Clara"}
   {"id": 1002,"name": "rahul","type":"employee","division": "Couchbase Cloud","manager": true,"salary": 10000.20,"office": null}
   {"id": 1003,"name": "jon","type":"employee","division": "Couchbase Cloud","manager": false,"salary": 2000.59}
   {"id": 1004,"name": "idris","type":"employee","division": "Couchbase Server","manager": false,"salary": 5000,"office": "New York"}
   {"id": 1005,"name": "anil","type":"contractor","division": "Product Management","manager": false,"salary": 12345.67}

2. Run cbimport:

   /opt/couchbase/bin/cbimport json -c localhost -u Administrator -p password -b people -f lines -d file://people.json --generator-delimiter '@' -g %id%::%name%#@MONO_INCR[100]@

   JSON import failed: unable to parse MONO_INCR start point [100

    

Expectation
For documents to import with keys set correctly:

1001::prasad::100

1002::rahul::101