Blivet 3.6.1

• misc: Remove "warn: false" from Ansible "command" (vtrefny)
• spec: Change license string to the SPDX format required by Fedora (vtrefny)
• Catch BlockDevNotImplementedError for btrfs plugin calls (vtrefny)
• tests: document how to use the VM tests (berrange)
• tests: allow filtering tests to run in VM (berrange)
• tests: don't start/stop VM if it was already running (berrange)
• tests: use correct password arg for SSH to VM (berrange)
• tests: add logging to runvmtests.py (berrange)
• Fix potential AttributeError when getting stratis blockdev info (vtrefny)
• spec: Fix recommended libblockdev plugins (vtrefny)
• tests: remove unused global variables (berrange)
• Backport total_memory improvements from anaconda (vslavik)
• Fix regex for checking e2fsprogs version (vtrefny)