Coverity CWE 330: Use of Insufficiently Random Values

Added support to fix CWE 330: Use of Insufficiently Random Values
Coverity issue

Change-Id: Ib12ebeeb9b0cc10af9980fe8661eb6230c2f6d6d
Signed-off-by: elumalai <deepika.e@tataelxsi.co.in>
diff --git a/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py b/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
index 6d167c6..f118cf1 100644
--- a/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
+++ b/RO-VIM-openstack/osm_rovim_openstack/vimconn_openstack.py
@@ -889,7 +889,7 @@
 
             if not ip_profile.get("subnet_address"):
                 # Fake subnet is required
-                subnet_rand = random.randint(0, 255)
+                subnet_rand = random.SystemRandom().randint(0, 255)
                 ip_profile["subnet_address"] = "192.168.{}.0/24".format(subnet_rand)
 
             if "ip_version" not in ip_profile: