Allow random seed with specified wallet_propose key_type (RIPD-1030)

src/ripple/rpc/tests/KeyGeneration.test.cpp

@@ -132,6 +132,9 @@ public:
 
         Json::Value params;
         params[jss::key_type] = keyType;
+
+        expect (! contains_error (walletPropose (params)));
+
         params[jss::passphrase] = common::passphrase;
 
         testSecretWallet (params, strings);