Description of problem:
foreman-protector locking plugin should allow leapp to be installed.
There is no need to run installer if leapp gets installed.

In documentation we can't advise "yum --disableplugin=foreman-protector install leapp" while advisable "satellite-maintain packages install leapp" involves an extra unnecessary installer run.

Lets add an exception for leapp & co. in order to be able to document just
"yum install leapp"

Version-Release number of selected component (if applicable):
6.11.0 Snap23

How reproducible:
deterministic

Steps to Reproduce:
1. Have a Satellite on EL7
2. Enable extras repo and try to install leapp

1. yum install leapp
   ...

WARNING: Excluding 13043 packages due to foreman-protector.
Use foreman-maintain packages install/update <package>
to safely install packages without restrictions.
Use foreman-maintain upgrade run for full upgrade.

No package leapp available.
Error: Nothing to do

Actual results:
foreman-protector locking plugin prevents yum to install leapp

Expected results:
foreman-protector locking plugin allows to install leapp by yum

Additional info:

RPMs to be added on whitelist:
leapp
leapp-deps
python2-leapp
leapp-upgrade-el7toel8
leapp-upgrade-el7toel8-deps
dnf
dnf-data
python2-dnf
libdnf
python2-libdnf
libmodulemd
librepo
libreport-filesystem
librhsm
libsolv0
python2-hawkey
python2-libcomps
json-glib