[XDCR] Connection pre-check to TLS ports 18091 displays that the check is happening over 8091 port

Steps:

1. Initialise 2 clusters with 2 nodes running just the KV service.
2. Enable TLS on source and destination clusters with encryption level set to "strict". Clusters are not accessible over 8091 port since encryption level is "strict".
3. Add an XDCR reference with hostname = "172.23.217.172:18091" and perform a connection pre-check.
4. The connection pre-check outputs the following:

   {

   "172.23.217.169:18091": {

   "172.23.217.172:8091": [

   "Connection check was successful, no errors"

   ],

   "172.23.217.173:8091": [

   "Connection check was successful, no errors"

   ]

   },

   "172.23.217.170:18091": {

   "172.23.217.172:8091": [

   "Connection check was successful, no errors"

   ],

   "172.23.217.173:8091": [

   "Connection check was successful, no errors"

   ]

   },

   "P2P/172.23.217.170:18091": {

   "172.23.217.169:18091": [

   "P2P protocol successfully executed, no errors"

   ]

   }

   }

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Case - 2
1.  A source and destination cluster is set up with 5000 port as it default.
-2. Connection pre-check outputs the following:{"172.23.104.66:8091":

{ "172.23.105.192:5000": [ "Connection check was successful, no errors" ] }

,"172.23.105.179:8091":{ "172.23.105.192:5000": [ "Connection check was successful, no errors" ] },"172.23.96.221:8091":

{ "172.23.105.192:5000": ["Connection check was successful, no errors" ] }

,"P2P/172.23.104.66:8091":{ "172.23.105.179:8091": [ "P2P protocol successfully executed, no errors" ],"172.23.96.221:8091": [ "P2P protocol successfully executed, no errors" ] }}-