VOL-264: REST Channel ( External REST Client <==> Chameleon) needs to be Secured

These are voltha itest and documentation updates after enforcing a https based
REST server implementation from the chameleon.

The chameleon related changes are already available as part of another review
https://gerrit.opencord.org/#/c/4478/ .

Change-Id: Icd585bb0403524c2e7a0f46fddcf3046876042b4
diff --git a/scripts/show_device_flows.py b/scripts/show_device_flows.py
index cf64a58..f90adb2 100755
--- a/scripts/show_device_flows.py
+++ b/scripts/show_device_flows.py
@@ -13,11 +13,11 @@
 Make sure you have VOLTHA_BASE_URL environment variable
 defined, examples:
 
-export VOLTHA_BASE_URL=http://localhost:8881/api/v1
+export VOLTHA_BASE_URL=https://localhost:8881/api/v1
 
 or
 
-export VOLTHA_BASE_URL=http://10.100.192.220:8881/api/v1
+export VOLTHA_BASE_URL=https://10.100.192.220:8881/api/v1
 """.format(sys.argv[0])
 
     def main(self):