renaming (2)

HySoP/hysop/numerics/tests/test_update_ghosts.py

-import parmepy.tools.numpywrappers as npw
-from parmepy.numerics.update_ghosts import UpdateGhosts, UpdateGhostsFull
-from parmepy.domain.box import Box
-from parmepy.fields.continuous import Field
-from parmepy.tools.parameters import Discretization
+import hysop.tools.numpywrappers as npw
+from hysop.numerics.update_ghosts import UpdateGhosts, UpdateGhostsFull
+from hysop.domain.box import Box
+from hysop.fields.continuous import Field
+from hysop.tools.parameters import Discretization
 import numpy as np