Fixes #10713 - improved backtrace logging

• full trace in 500 page in production shows really the full trace
• Foreman::Logging.exception as an unified entry point for exceptions logging
• the backtrace cleaner doesn't delete the plugins
• the orchestration exceptions gets the backtrace covered by logger...

fixes #8516 - removing the require 'fog' from the project, requiring only what we use

Refs #3809 - Remove cops for empty lines

Refs #3809 - Use parentheses in method definitions

Fixes #2839 - retry SSH authentication issues with cloud-init

fixes #2813 - move Foreman::Provision::SSH files back to /lib so it does not fail on startup for non-fog installations

fixes #2411 - move files to /app/services