33332f4c74
Firecracker launches tries to open VM disk image before every boot, parses partition table, finds boot partition, tries to read it as FAT32 filesystem, extracts uncompressed kernel from `bzImage` (firecracker doesn't support `bzImage` yet), extracts initramfs and passes it to firecracker binary. This flow allows for extended tests, e.g. testing installer, upgrade and downgrade tests, etc. Bootloader emulation is disabled by default for now, can be enabled via `--with-bootloader-emulation` flag to `osctl cluster create`. Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>