MS SQL: allow multiple table and schema excluding rules to be processed correctly

[troley]

This allows multiple excluding table names like 'TABLE' in schema 'SCHEMA' rules to be provided in the load file when parsing data from and MS SQL database.

The following rule is already being processed correctly and won't change with this PR:

excluding table names like 'SomeTable' in schema 'dbo'

This commit allows the following rules to be processed correctly as well:

excluding table names like 'SomeTable' in schema 'dbo'
excluding table names like 'AnotherTable' in schema 'dbo'
excluding table names like 'SomeTable' in schema 'otherdbo'

Fixed #1328