Add transfer logic as post sync process step.

Add authtoken for youtuber in test data setup to call transfer api
Update e2e test to include scenario where we transfer channel.

sdk/api.go

@@ -45,6 +45,8 @@ type YoutubeChannel struct {
 	DesiredChannelName string `json:"desired_channel_name"`
 	Fee                *Fee   `json:"fee"`
 	ChannelClaimID     string `json:"channel_claim_id"`
+	TransferState      int    `json:"transfer_state"`
+	PublishAddress     string `json:"publish_address"`
 }
 
 func (a *APIConfig) FetchChannels(status string, cp *SyncProperties) ([]YoutubeChannel, error) {