rpcdaemon: nonsystematic failure in ots_searchTransactionsAfter integration test 03

[canepat]

This happened in #2789 here but it is not easily reproducible in debug build. It doesn't seem to be related to the changes in such PR.

test_03.-diff.json

 {
   result: {
     receipts: [
       ...
       ...
       {
-        cumulativeGasUsed: "0xb459bd"
+        cumulativeGasUsed: "0xb49700"
       }
       ...
       ...
       ...
       ...
       ...
       ...
       ...
       ...
       ...
       ...
       ...
       ...
     ]
   }
 }