[CX] Wrong error message on trying to connect to a bucket which does not exist in cluster.

1. Do not create bucket test in couchbase cluster.Instead there is default bucket on cluster.

2. cbq> create bucket test with {"bucket":"test","nodes":"172.23.108.232"} ;

3. cbq> create shadow dataset test_shadow on test;

4. cbq> connect bucket test ;

Error message:

{

	"requestID": "a190fb37-1317-4411-bce3-c7d31258c41d",

	"signature": "*",

	"errors": [{ 

	"code": "1",

	"msg": "Unauthorized (bucket\/password invalid) - please check credentials!"

	}],

	"status": "fatal",

	"metrics": {

		"elapsedTime": "27.028701ms",

		"executionTime": "26.761428ms",

		"resultCount": "0",

		"resultSize": "0"

	}

}