Fix bug 1614 - fixing build to allow python3 -m build

Change-Id: Id2db32f81dd4f4e7b411ebc2a189f6817a26d63c
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/osm_im/validation.py b/osm_im/validation.py
index 6cc4f0d..561e716 100644
--- a/osm_im/validation.py
+++ b/osm_im/validation.py
@@ -18,8 +18,7 @@
 from osm_im.vnfd import vnfd as vnfd_im
 from osm_im.nsd import nsd as nsd_im
 from osm_im.nst import nst as nst_im
-etsi_nfv_vnfd = importlib.import_module("osm_im.etsi-nfv-vnfd")
-etsi_nfv_nsd = importlib.import_module("osm_im.etsi-nfv-nsd")
+from osm_im import etsi_nfv_vnfd, etsi_nfv_nsd
 from pyangbind.lib.serialise import pybindJSONDecoder
 import pyangbind.lib.pybindJSON as pybindJSON