Still fetch config on initial app load.

This is to help with the app not wanting to initialize the envoy control
plane until a request has been made, but we should go ahead and try to
populate config on app boot.

src/api-umbrella/utils/active_config_store/polling_set_active_config.lua

@@ -22,12 +22,6 @@ return function(cache, callback)
   if last_fetched_version_err then
     ngx.log(ngx.ERR, "Error fetching last_fetched_version: ", last_fetched_version_err)
     return
-  elseif not last_fetched_version then
-    -- If the active config hasn't been set yet, then this means the first
-    -- fetch (triggered on demand by active_config_store.get) yet completed, so
-    -- return and wait for that to complete, since there's no need to poll for
-    -- a newer version with nothing stored yet.
-    return
   end
 
   -- If this set of worker processes hasn't been setup yet (initial boot or

src/api-umbrella/utils/active_config_store/set_envoy_config.lua

@@ -649,7 +649,6 @@ local function update_control_plane(active_config, clusters, listeners, route_co
     write_control_plane_config_file("listener-" .. resource["name"] .. ".json", json_encode(resource))
   end
 
-
   write_control_plane_config_file("route-configuration.json", json_encode(route_configuration))
 
   -- Remove any files from the data directory that shouldn't be there any