Fix: a broken test.
Ref: fix the tests name.
Ref: no need to create a socket when creating a connection client. It should be created upon connection.
Fix: APIS-606, adjusted test cases to run on CUBRID 8.4.4 and 9.2.0.
Enh: allow to get engine version synchronously.
Fix: a broken test.
Merge pull request #5 from CUBRID/APIS-604

Fix: APIS-606, adjusted test cases to run on CUBRID 8.4.4 and 9.2.0.