removed unused ipVersion from config; add 'site' field that will be made distinct entry in alert details

alerts/plugins/ip_source_enrichment.json

@@ -1,13 +1,13 @@
 {
   "known": [
     {
-      "ipVersion": 4,
       "range": "8.32.0.0/16",
+      "site": "OFFICE1",
       "format": "{0} is in OFFICE1."
     },
     {
-      "ipVersion": 6,
       "range": "4a00:7a49:232::/48",
+      "site": "OFFICE2",
       "format": "{0} is in OFFICE2."
     }
   ]

alerts/plugins/ip_source_enrichment.py

@@ -91,13 +91,13 @@ class message(object):
     {
       "known": [
         {
-          "ipVersion": 4,
           "range": "1.2.3.4/8",
+          "site": "office1",
           "format": "IPv4 {1} is known"
         },
         {
-          "ipVersion": 6,
           "range": "1a2b:3c4d:123::/48",
+          "site": "office2",
           "format": "IPv6 {1} is known"
         }
       ]