* Code quality pass

* Typofix

* Update applications_controller_spec.rb

* Update applications_controller_spec.rb

Fix #3565 (oops)

* Revert "Enable UniqueRetryJobMiddleware even when called from sidekiq worker (#4836)"

This reverts commit 6859d4c028.

* Revert "Do not execute the job with the same arguments as the retry job (#4814)"

This reverts commit be7ffa2d75.

* add redis-namespace gem

* namespace redis usage

* refactor redis namespace code to be less intrusive

previously : would be prepended to keys when the
REDIS_NAMESPACE env var was not set

now if it is not set the namespacing functions are
not used at all, which should prevent disruptions
when instances update.

* fix redis namespace variable style in streaming js

* remove trailing space

* final redis namespace style fix

connection options instead of setting REDIS_HOST etc individually

Close #1986

to be more readable, add extra logging to process feed service

a basic home timeline