Fix broken dependencies

This is a quick fix to checkout the latest tag of N2VC (BUILD_v4.0.1_1).
Recent commits reveal that some Dockerfiles are using master, instead of
the most recent release, which has caused the install to fail due to
changes in master.

Change-Id: I31280a976d9be2acccca1c75e5b86afeac58e8ee
Signed-off-by: Adam Israel <adam.israel@canonical.com>
diff --git a/setup.py b/setup.py
index 0c7f055..45de1f8 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
     name=_name,
     description='OSM North Bound Interface',
     long_description=README,
-    version_command=('git describe --tags --long --dirty', 'pep440-git'),
+    version_command=('git describe --match v* --tags --long --dirty', 'pep440-git'),
     # version=VERSION,
     # python_requires='>3.5.0',
     author='ETSI OSM',