[PM-704] Fixes for spare DC deployment

Context

• Changes triggered by spare data collectors deployment

What was done

• Generate a default value for java_server_install_name
• Reimplement the forgotten java_server_application_start_name variable

QA

• Used for deployment of 4 spare collectors already

Review objectives

• assessment of code functionality
• assessment of code quality
• identifying potential refactorings / logic common to other projects
• knowledge sharing