[Consensus] Require standard transactions for testnet

This brings testnet more in-line with the consensus requirements that
are present on mainnet.

Author: Fuzzbawls

src/chainparams.cpp

@@ -288,7 +288,7 @@ class CTestNetParams : public CMainParams
         fMiningRequiresPeers = true;
         fAllowMinDifficultyBlocks = true;
         fDefaultConsistencyChecks = false;
-        fRequireStandard = false;
+        fRequireStandard = true;
         fMineBlocksOnDemand = false;
         fTestnetToBeDeprecatedFieldRPC = true;