change cherrypy version to 18.1.2

Change-Id: Id9a2e516e253ccf174d2ac7849178da7bdac0576
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/debian/python3-osm-nbi.postinst b/debian/python3-osm-nbi.postinst
index 5ff9ec7..769c250 100755
--- a/debian/python3-osm-nbi.postinst
+++ b/debian/python3-osm-nbi.postinst
@@ -21,7 +21,7 @@
 echo "Installing python dependencies via pip..."
 
 pip3 install pip==9.0.3
-pip3 install cherrypy==18.0.0
+pip3 install cherrypy==18.1.2
 pip3 install keystoneauth1
 
 #Creation of log folder