fixes #18540 - update domain on primary in hosts_count tests

domain/domain_id are not attributes of the host itself, they're
delegated to the primary interface. When using update_attribute on the
host, the model doesn't appear `changed?` so Rails 5 skips the save....

Fixes #18227 - clean up variables after rendering

fixes #18489 - test AuthSourceLdap missing and blank passwords

After 2348fc8e, providing an empty password during update would erase
the existing password. Other resource type tests were updated, but not
AuthSourceLdap, so these now reflect the current behaviour....

fixes #18373 - vmware: do not pass automatic firmware to vm

Fixes #18412 - Alert styling for adrift host time

The alert for hosts time adrift on reports has the styling we had prior
to Patternfly. It should use the new styling.

fixes #18216 - volume size editable for existing VMs one

fixes #13618 - cache expensive vmware api calls

fixes #18233, #18235 - isolate pagelets state between tests

Moves pagelets state into instances of Pagelets::Manager with clearer
dup semantics, and allows the instance to be backed up and restored
around tests using the PageletsIsolation test case mixin.

Fixes #18040 - URL escape PuppetCA CN on proxy view

If the CN contains characters that cannot be displayed in an URL, like
'mcollective/OL=mcollective', the puppetca list will not be able to
render.

The reason is that Rails cannot generate an URL for such CNs, so we need...

refs #17526 - reset taxonomy.current after each test

The shared "ignores the taxable_type if current taxonomy ignores it"
test failed to reset the taxonomy in teardown, instead using the setup
routine. This causes failures in different test cases when the test was...