Fix ApplicationController complexity

[telday]

Is your feature request related to a problem? Please describe.

According to Code Climate the application_controller.rb file is currently slightly over the line limit per file and should be refactored. Currently it is 253 lines it should be <250.

During refactoring the repeated use of the logger.debug("#{e}\n#{e.backtrace.join("\n")}") line which appears in almost every method.