Feature #24465: Testing framework for distributed resources and GlideinWMS
Add the possibility to override "attributes" (-params...) in manual_glidein_startup
Add to manual_glidein_startup command-line options to override the attributes (params) received from the Factory and Frontend.
https://glideinwms.fnal.gov/doc.prd/frontend/troubleshooting.html (search for 'manual')
Development branch (off branch_v3_7)