fixes #2411 - move files to /app/services
fixes #2411 - move lib/audit_extensions lib/fog_extensions lib/foreman to models/concerns
fixes #2411 - add ActiveSupport::Concern syntax to mixins
fixes #2411 - remove unnecessary require statements
fixes #2411 - refactor - copy code from lib/foreman.rb and paste in initializers/foreman.rb
fixes #2411 - refactor - move regexp_extensions from require in Gemfile to initializers
fixes #2411 - refactor - move core_extensions.rb and timed_cached_store.rb to initializers and remove require statements in application.rb