RQG: CountScan() returns wrong results (Difference in number of results for same n1ql queries with not keyword with same dataset for 4.1 and 4.5)

Test run:

./testrunner -i adv.ini  -t rqg.test_rqg.RQGTests.test_rqg_concurrent,test_file_path=b/resources/rqg/multiple_table_db/query_test_using_templates/query_50000_subquery.txt.zip,database=multiple_table_db,reset_database=True,concurreny_count=10,index_quota_percent=30,password=password,use_mysql=True,replicas=0,nodes_init=1,total_queries=2000,skip_cleanup=True

This test creates only primary indexes using gsi.

There is no crud operation during the test.

No indexes are created/dropped during the test.

It compares various subquery results from n1ql/s1l based on fields. 

There was a mismatch in n1ql and sql subqueries.

Example of 1 such n1ql subquery:

SELECT  t_1.*  FROM  simple_table_2  t_1   WHERE  EXISTS      (SELECT * FROM  simple_table_10  t_4 USE KEYS META(t_1).id   WHERE   ((t_4.int_field1 != 5185 OR (t_4.varchar_field1 IS NOT NULL) AND (t_4.primary_key_id LIKE '549%'))) AND (((NOT (t_4.bool_field1) AND t_4.int_field1 > 5185)) AND (NOT ((t_4.primary_key_id  IN [  "1" , "10" , "100" , "1000" , "101"  ] AND t_4.int_field1 > 5185)))) );

I narrowed down the subquery to:

SELECT * FROM  simple_table_10  t_4   WHERE    (((NOT (t_4.bool_field1) AND t_4.int_field1 > 5185)) ) ;

 This query can be executed only with primary index on simple_table_10.

This results 247 results in 4.5 while 258 results in 4.1

Uploading logs and dataset for both cases.