add rule deserilization class
add rule deserilization class

The CLI was not setting the inv_setter for list objects, and
the rule class was not included at runtime. This fix fixes both
of those issues because the CLI was not able to set rule fields
without both of these fixes.

Change-Id: I0a85d71dfb2369dcd5737e09c17f2533fb6e395c
Signed-off-by: Joe Mills <16a9a54ddf4259952e3c118c763138e83693d7fd@midokura.com>
Fixes: MN-3354

celebdor/python-midonetclient,celebdor/python-midonetclient