Set config.Provider to provider name instead of provider url

apart from its use in snowflake/bootstrap.go its also used
to form the path to eip-service.json file on disk and motd
package both expects the provider name instead of provider
url

pkg/bitmask/init.go

@@ -53,7 +53,7 @@ func GetConfiguredProvider() *ProviderInfo {
 }
 
 func ConfigureProvider(opts *ProviderOpts) {
-	config.Provider = opts.ProviderURL
+	config.Provider = opts.Provider
 	config.ApplicationName = opts.AppName
 	config.BinaryName = opts.BinaryName
 	config.Auth = opts.Auth