Fixes #17438 - Disable selecting IPv6 on import

(cherry picked from commit a4dccd9b55f441172983de16ba60206b15490e81)

Fixes #16782 - reset dhcp record cache after mac change

(cherry picked from commit 969832057c5ea6a1f84eaf5c53f5cdc7ee445af2)

Fixes #17864 - Show smart proxy errors on unattended fail

If your proxy is has some error (like misconfigured sudoers, puppet not
available, etc...) and you try to boot a host through unattended
mode [1], the exception will not show up when you try to fetch the...

Fixes #17904 - Show tooltips for long proxy log messages

(cherry picked from commit 5bd2b7485431068606fbcffb30f8b942e2d26632)

Fixes #17855 - reflect changes to template on image selection

In oVirt images are based on templates, so when an image is selected
on operating system tab, the template field on compute resource tab
should change accordingly.
(cherry picked from commit 0c78cd75104a316cd78c5cd3ff9df3232bb8e144)

Fixes #13775 - merge if data set is present

(cherry picked from commit 8e81effcedafc539cbe3477b5565d9239f1f2f51)

Fixes #17870 - Empty boolean matcher should not turn into false

(cherry picked from commit d836a8383f1188f23b6ffbffa1a8fbbf52bef139)

Fixes #17858 - OpenStack scheduler doesn't show spinner

Foreman does not show the spinner when the OpenStack scheduler hints are
loading, instead it just shows a javascript error.

(cherry picked from commit 7d71275255271ec8cebe12ca30645ed9299f189d)

Fixes #17842 - Adds 'type = compute_resource' to Audit search

(cherry picked from commit a503379ae944faf95534e02069692ec95eb9a677)

Fixes #17808 - fix 'multipart form data' IE bug

According to this bug
(https://connect.microsoft.com/IE/Feedback/Details/868498),
multipart form data is malformed if there are fields without names.
This bug has been solved within Edge browser,
however no solution is expected for IE10/IE11...