DebianSource: fix is_native()

Determine from changelog if debian/source/format does not provide any
type (1.0 format).

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
tests: Fix tests for Ubuntu

On Ubuntu dch produces different version numbering. Adapt tests for
this.

Adds a jew class to parse '/etc/lsb-release' to determine the
distribution and it's codename to dynamically adapt tests accordingly.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
buildpackage: implement --[no-]hooks option

For enabling/disabling all hooks. This option does not affect the
builder command, though.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>