Fixes #19612 - CVE-2017-7505 don't expose admin to taxed users

(cherry picked from commit af9edf1098bf8e643e1607f9375595e375e7ade6)

Conflicts:
app/models/notification.rb

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 #19034 - add tasks for clearing expired notifications

(cherry picked from commit 56d54dc2c97e7bd94fbf47ded8cc443947d146af)

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 #19236 - handle situation when host is destroyed oVirt

The issue was introduced in 4269abbd, where we replaced the
`OVIRT::OvirtException` error by `ActiveRecord::RecordNotFound` in
`find_vm_by_uuid method`, but we haven't updated the corresponding...

Fixes #19213 - use provision interface in foreman_url

Before this patch, we were using primary interface for checking on ftfp
proxy and its template feature. Provision interface is more appropriate
for this purposes.

(cherry picked from commit 778d8bcbc08f790aae8ed2abb9637ab880804275)

refs #19419 - test aws fog_extensions name methods

Fixes #18995, #18996 - visible_environments works w/o taxonomies

Fixes #18687 - restore hash format for parameter attributes