Fix Bug 914: Updating VNFD the first time shows ProducerClosed error

Change-Id: I02f9ad72bbc4256954030b4d338af242d1f81b81
Signed-off-by: delacruzramo <pedro.delacruzramos@altran.com>
diff --git a/debian/python3-osm-common.postinst b/debian/python3-osm-common.postinst
index 2c60d98..9d91a84 100755
--- a/debian/python3-osm-common.postinst
+++ b/debian/python3-osm-common.postinst
@@ -20,8 +20,8 @@
 echo "POST INSTALL OSM-COMMON"
 echo "Installing python dependencies via pip..."
 
-pip3 install --upgrade aiokafka==0.4.*
-pip3 install --upgrade pymongo==3.7.*
+pip3 install --upgrade aiokafka
+pip3 install --upgrade pymongo
 pip3 install --upgrade pyyaml==5.*
 pip3 install pycrypto   # added dependency python3-crypto seems not working