Add txid to SubmitRedeemTx response (#434)

* Add txid to SubmitRedeemTxResponse proto message

* Update server

* Update client

* Update e2e test

* Fix e2e tests

Author: altafan

api-spec/openapi/swagger/ark/v1/service.swagger.json

@@ -871,6 +871,9 @@
       "properties": {
         "signedRedeemTx": {
           "type": "string"
+        },
+        "txid": {
+          "type": "string"
         }
       }
     },

api-spec/protobuf/ark/v1/service.proto

@@ -180,6 +180,7 @@ message SubmitRedeemTxRequest {
 }
 message SubmitRedeemTxResponse {
   string signed_redeem_tx = 1;
+  string txid = 2;
 }
 
 message GetTransactionsStreamRequest {}