Make all mounts to be performed in a private namespace.

This makes mount and umount commands unnecessary because all mounts
are done in a private namespace during enter or exec phases.
Also, enter and exec commands are unnecessary as well because
action to be performed can be determined by presence of command name and args.
Hence, no action is needed to be specified;
the new command line syntax looks like this:
mer-sdk-chroot [command args...]

Signed-off-by: Oleg Girko <ol+mer@infoserver.ru>

Added some compatibility code so sdk mount/umount is an error and
sdk enter/exec still works

Modified-by: David Greaves <david@dgreaves.com>
Add services to support sdk engine internal lan

Signed-off-by: David Greaves <david.greaves@jollamobile.com>
Ensure spec is up-to-date with yaml

Signed-off-by: David Greaves <david.greaves@jollamobile.com>
Make libsb2 upgradable in sdk-install mode

Removed libsb2 related rules/mappings from the sdk-install mode and
cleaned up consequently unused rules.

Signed-off-by: Juha Kallioinen <juha.kallioinen@jollamobile.com>
Run specify on yaml, not spec

Signed-off-by: David Greaves <david.greaves@jollamobile.com>