[misc] improve no cache benchmark

Author: rusher

src/benchmark/java/org/mariadb/jdbc/Common.java

@@ -104,7 +104,7 @@ public void createConnections() throws Exception {
  password,
  true,
  false,
- "&prepStmtCacheSize=0" + other);
+ "&prepStmtCacheSize=0&cachePrepStmts=false" + other);
 
  connectionBinaryNoCache =
  ((java.sql.Driver) Class.forName(className).getDeclaredConstructor().newInstance())