rpc: Rename size to vsize in mempool related calls

test/functional/mining_prioritisetransaction.py

@@ -64,7 +64,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
         for i in range(3):
             for j in txids[i]:
                 assert j in mempool
-                sizes[i] += mempool[j]['size']
+                sizes[i] += mempool[j]['vsize']
             assert sizes[i] > MAX_BLOCK_BASE_SIZE  # Fail => raise utxo_count
 
         # add a fee delta to something in the cheapest bucket and make sure it gets mined