Changing where staging action gets user id from for cloud data

[eiffel777]

Changing where cloudstaging action gets user id from. Instead of using mod_shredder which does not exist in the xsede version use modw.systemaccount instead and add resource_id to join clause.

This also fixes this error.

ETL\EtlOverseer: Error verifying data endpoints:
('Cloud DB', class=ETL\DataEndpoint\Mysql, config=datawarehouse, schema=mod_shredder, host=tas-db1.ccr.buffalo.edu:3306, user=xdmod): Schema 'mod_shredder' does not exist for user 'xdmod'
#0 /data/www/xdmod/share/classes/ETL/EtlOverseer.php(379): ETL\EtlOverseer->verifyDataEndpoints(Object(ETL\Configuration\EtlConfiguration), true)
#1 /data/www/xdmod/share/tools/etl/etl_overseer.php(612): ETL\EtlOverseer->execute(Object(ETL\Configuration\EtlConfiguration))
#2 {main}

Motivation and Context

Prevents errors with being used with XSEDE and make sure user is retrieved from the correct resource

Tests performed

Manually verified in docker and all test pass

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project as found in the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.