fix 1220: dependency version grpcio-tools==1.32.0 grpclib==0.4.1

Change-Id: If277dee299fe61b76126268df27df7737bb77a56
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/debian/python3-osm-lcm.postinst b/debian/python3-osm-lcm.postinst
index 8a7082c..bf72e66 100755
--- a/debian/python3-osm-lcm.postinst
+++ b/debian/python3-osm-lcm.postinst
@@ -21,7 +21,7 @@
 echo "Installing python dependencies grpcio-tools grpclib via pip..."
 echo
 python3 -m pip install -U pip
-python3 -m pip install grpcio-tools grpclib
+python3 -m pip install grpcio-tools==1.32.0 grpclib==0.4.1
 
 # Creation of log folder
 # mkdir -p /var/log/osm