Remove remaining LXC packages which are installed as a part of Ubuntu
installation. Since LXC is installed manually, some remaining artifacts
may break behavior of library and tools

Signed-off-by: Alexander Livenets <[email protected]>

python3-lxc Ubuntu package depends on LXC packages, therefore LXC of
conflicting version will be installed.

This commits fixes installation of python-lxc by installing it from
source.

Signed-off-by: Alexander Livenets <[email protected]>

Add `--enable-apparmor` and `--enable-seccomp` flags at LXC
configuration stage

AppArmor is required to allow to apply additional MAC restrictions to
container described in AppArmor profile.

seccomp is required to apply additional restrictions on system calls
from container using seccomp syscall blacklist and whitelist.

Signed-off-by: Alexander Livenets <[email protected]>