Add a Kentik service to GSO

Add and remove devices using Kentik, the router creation and termination workflows have been updated

gso/oss-params-example.json

@@ -108,6 +108,7 @@
     "user_email": "robot-user@geant.org",
     "api_key": "kentik_api_key",
     "device_type": "router",
+    "minimize_snmp": false,
     "billing_plans": {
       "1": "XL license",
       "2": "L license",
@@ -116,6 +117,7 @@
     },
     "sample_rate": 100,
     "bgp_type": "device",
+    "bgp_lookup_strategy": "lu_global_fallback",
     "ASN": 137,
     "route_selection": "both directions",
     "snmp_community": "secret community string",