router creation flow update

create_router workflow takes a router to the PROVISIONING state

subscription service includes method for fetching all PROVISIONING routers

create_iptrunk workflow can now also select PROVISIONING routers next to ACTIVE ones

modification workflows can also be executed on provisioning routers (ibgp update, base config redeploy, etc)

gso/translations/en-GB.json

@@ -36,6 +36,7 @@
         }
     },
     "workflow": {
+        "activate_router": "Activate router",
         "confirm_info": "Please verify this form looks correct.",
         "deploy_twamp": "Deploy TWAMP",
         "migrate_iptrunk": "Migrate IP Trunk",