[CX] Dataset remains same even if bucket is deleted

1. Create bucket test with 1 document

2. create connection and shadow dataset:

file.txt:

use CouchbaseAnalytics;

create bucket test with {"bucket":"test","nodes":"172.23.107.182","password":"password"};

create shadow dataset test_shadow on test;

connect bucket test;

3. Issue following curl command:

curl -s --data pretty=true --data format=CLEAN_JSON --data-urlencode "statement@file.txt" http://localhost:8095/analytics/service

4. issue a query in file1.txt:

curl -s --data pretty=true --data format=CLEAN_JSON --data-urlencode "statement@file1.txt" http://localhost:8095/analytics/service

where file1.txt has:

use CouchbaseAnalytics;

select count(1) from test_shadow;

Result is correct.

5. Delete bucket test from the node.

6. Issue the query in file1.txt again :

curl -s --data pretty=true --data format=CLEAN_JSON --data-urlencode "statement@file1.txt" http://localhost:8095/analytics/service

Result is still 1 document .

Dataset did not get updated even when the bucket was deleted.