remove bios_id_missing flag as we no longer depend on it
add test for MapDevices method
refactor method MapDevices
fixes from review
start moving functionality from BootStorage to DeviceMapping class
move also udev to kernel device mapping
add more tests for separated class
move mount by mapping and write tests for it
update test according to review
add documentation
implement caching
cleanup BootStorage as now functionality is in device mapping class
fixes from review
add documentation for internal method and improve detection of creating partitions as it is one time operation
more documentation
use directly Device Mapping in code
fixes from review
fix from review (thanks mvidner)
change naming according to mvidner
Merge remote-tracking branch 'origin' into simplify_boot_storage