…amg#430)

`yum_base.doPackageLists()` works with default locale, which cannot be
overridden. So if it fails due to the default locale being invalid, we
can't really do much about it.

- on test_rpmscanner.py need to skip the test on python 3 since bug on dnf api for python: https://bugzilla.redhat.com/show_bug.cgi?id=1789840

RpmScanner: Throw an error if a yum call fails due to invalid locale (oamg#430)

`yum_base.doPackageLists()` works with default locale, which cannot be
overridden. So if it fails due to the default locale being invalid, we
can't really do much about it.

- on test_rpmscanner.py need to skip the test on python 3 since bug on dnf api for python: https://bugzilla.redhat.com/show_bug.cgi?id=1789840

## Packaging
- Add dependency on python2-leapp and leapp-framework
- Add python-requests as dependency (oamg#407)
- Drop leapp sos plugin (it's part of the sos rpm in RHEL 7.7+)
- Remove dependency on Jinja2 related packages (oamg#407)

## Fixes
- Do not mount pseudo and unsupposrted FS to overlayfs (e.g. proc)
- Evaluate PES events transitively to create correct data for the upgrade transaction
- Fix boot order on EFI systems
- Fix checking of kernel drivers (oamg#400)
- Fix failures caused by local rpms added into the upgrade transaction
- Fix getting mount information with mountpoints with spaces in the path
- Fix handling of XFS without ftype for every such mounted FS
- Fix issue with random booting into old RHEL 7 kernel after the upgrade
- Fix issues on systems with statically mapped IPs in /etc/hosts
- Fix issues with device mapper and udev in a container
- Fix issues with failing rpm transaction calculation because of duplicate instructions for dnf
- Fix various issues related to RHSM (e.g. https://bugzilla.redhat.com/show_bug.cgi?id=1702691)
- Fix yum repository scan in case of repositories with invalid URL
- Inhibit the upgrade if multiple kernel-devel rpms are installed
- Inhibit the upgrade when links on root dir '/' are not absolute to save the world
- Parse correctly kernel cmdline inside the initrd (oamg#383) (fixes various issues on s390x)
- Print warnings instead of a hard failure when expected rpms cannot be found (e.g. python3-nss inside an rpm module) (oamg#405)
- Remove java11-openjdk-headless during the upgrade (https://bugzilla.redhat.com/show_bug.cgi?id=1820172)
- Throw a nice error when invalid locale is set (oamg#430)

## Enhancements
- Add initial multipath support (it doesn't handle all cases yet)
- Changed upgrade paths: RHEL-ALT 7.6 -> 8.2; RHEL 7.8 -> 8.2
- Check if the latest installed kernel is booted before the upgrade
- Check that the system satisfies minimum memory requirements for the upgrade (oamg#413)
- Dump `grub2-editenv list` output to help with issues related to the default kernel for the boot
- Improved report related to KDE/GNOME
- Inhibit the upgrade for ipa-server (oamg#481)
- Inhibit the upgrade on EFI systems when efibootmgr is not installed
- Inhibit the upgrade on FIPS systems
- Inhibit the upgrade when the raised dialogs are missing answers (oamg#589)
- Introduce new ways of using custom repositories during the transaction
- Make report messages more explicit about Dialogs (oamg#600)
- Migrate SpamAssassin
- Migrate cups-filters
- Migrate sane-backend
- Modify vim configuration to keep the original behaviour
- Report changes in wireshark
- Support the upgrade without the use of subscription-manager
- The name and baseurl field in the CustomTargetRepository message are optional now
- Use the new framework mechanism to inhibit the upgrade without reporting errors
- Various texts are improved based on the feedback

## Additional changes interesting for devels
- Add new functions in the config library to get envars related to leapp
- Add support for testing with Beta and HTB systems
- LEAPP_SKIP_CHECK_OS_RELEASE has been renamed to LEAPP_DEVEL_SKIP_CHECK_OS_RELEASE
- Provide info about kernel cmdline via KernelCmdline message
- The IPUConfig message contains information about booted kernel
- The code is mostly Py2/Py3 compatible now and all PRs are tested on Py2 and Py3 compatibility (linters, unit-tests)
- The config.version library contains is_rhel_alt() for detection of RHEL-ALT