refs #19534 - check EncryptValue class variables are defined

bed4594 added class variables to record logging state, but failed to
check it was defined before accessing them, causing exceptions when
decryption failed. Tests added for this new behaviour.

(cherry picked from commit 1da8bd42a95c9e254ea28efbd1b409ac5ab3033e)

Fixes #19534 - removed excessive encryptor logging

(cherry picked from commit bed45946878572b854e64b54ca63a8b294cb53bf)

Fixes #19631 - ComputeResource with KeyPair can be removed

The concern for removing the compute resources with keypairs was trying
to destroy the compute resource too early. Also, this deletion already
happened because of the has_one :dependency => :destroy relation...

fixes #19419 - fix invalid syntax in aws fog extention

Fix invalid syntax in server.rb

fixes #19035 - rewrite TopbarSweeper without rails-observers

Moves from the observer object into two mixins, one on the model and one
on the top-level controllers to observe creates/updates/destroys on
monitored models. Replaces rails-observers as it lacks Rails 5 support.

Fixes #15374 - move progress_report_id to Host::Base

fixes #18064 - import host from compute resource

Fixes #18949 - info message about current user

Fixes #18952 - fix destroy of host without owner

The notifications failure caused the host not being deleted.
I don't think the notifications should interfere with the core
functionality of the objects.

fixes #18476 - users have ssh keys