Implement getChanges method for Arcane SQL server

[s-vitaliy]

Part of #61

Scope

Implemented:

• The getChanges method in the MsSqlConnection that reads changes from the database.

Additional changes:

• The QueryRestult trait was moved to another file
• The ScalarQueryResult class was addded
• The AutoClosable interface implementation was moved to the common trait ResultSetOwner from QueryResult implementations.

Checklist

• GitHub issue exists for this change.
• Unit tests added and they pass.
• Line Coverage is at least 80%.
• Review requested on latest commit.