Sqlserver->describe failing for models with a schemaName

When models have a schemaName set it was searching for TABLE_NAME = 'schema_name.table_name'.
Instead it should search for TABLE_NAME = 'table_name' AND TABLE_SCHEMA = 'schema_name'
Add missing spaces
Merge pull request #2961 from ovidiupruteanu/patch-3

Sqlserver->describe failing for models with a schemaName
Retain the original file name so errors can be generated properly.

We should hold onto the original file so we can generate a error message
when the file is not found.

Fixes #2990
Closes #3011
Merge branch 'master' into 2.5