Adding new config settings conn_properties and enable_tds_logging to tap-mssql (Rob Winters variant)

[s7clarke10]

New setting for the wintersrd variant of tap-mssql.

Optional:

The "conn_properties" allows specific tweaking of database settings via SQL set statements to send to the database instance upon connection establishment. Can be a string or another kind of iterable of strings.

The default values set if this settings is not defined are:

"SET ARITHABORT ON; SET CONCAT_NULL_YIELDS_NULL ON; SET ANSI_NULLS ON; SET ANSI_NULL_DFLT_ON ON; SET ANSI_PADDING ON; SET ANSI_WARNINGS ON; SET ANSI_NULL_DFLT_ON ON; SET CURSOR_CLOSE_ON_COMMIT ON; SET QUOTED_IDENTIFIER ON; SET TEXTSIZE 2147483647;"

Example: override the built-in session properties supplied by pymssql by default, because one of the default settings (CURSOR_CLOSE_ON_COMMIT) is not available on PDW

{
  "conn_properties": "SET ARITHABORT ON; SET CONCAT_NULL_YIELDS_NULL ON; SET ANSI_NULLS ON; SET ANSI_NULL_DFLT_ON ON; SET ANSI_PADDING ON; SET ANSI_WARNINGS ON; SET ANSI_NULL_DFLT_ON ON; SET QUOTED_IDENTIFIER ON; SET TEXTSIZE 2147483647;"
}

Optional:

The "enable_tds_logging" When set it will dump out the underlying TDS driver logs. Useful for diagnosing issues if you are having connection issues to SQL Server databases. WARNING! this
does dump a lot of information and may log secure data, should be only used in Development
environments.

{
  "enable_tds_logging": true
}

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[edgarrmondragon]

Thanks @s7clarke10!