Added new API for FADump

- FATE#315780
- Including testcase
Support for Firmware-Assisted dump in UI
Added changes entry file and new version
Updating initrd if needed

- As defined in FATE#315780
- More info in https://www.suse.com/support/kb/doc.php?id=7012786
Added testcase
Adapted build-requirements
Incorporated changes suggested by review
Fixing possible issues when enabling fadump

- If fadump is not supported
Changed Kdump (new) API to better reflect what the call does
Simlified test description
Fixing a typo in test description
Merge pull request #3 from kobliha/fadump

Added FADump support