change MAX_FILTER_NUM from 100000 to 50000

Author: 317787106

framework/src/main/java/org/tron/core/services/jsonrpc/TronJsonRpcImpl.java

@@ -113,7 +113,7 @@ public enum RequestSource {
 
   private static final String FILTER_NOT_FOUND = "filter not found";
   public static final int EXPIRE_SECONDS = 5 * 60;
-  private static final int MAX_FILTER_NUM = 100000;
+  private static final int MAX_FILTER_NUM = 50000;
   private static final Cache<LogFilterElement, LogFilterElement> logElementCache =
       CacheBuilder.newBuilder()
           .maximumSize(300_000L) // 300s * tps(1000) * 1 log/tx ≈ 300_000