String.split(String regex) bug fix (#1696)

client-adapter/elasticsearch/src/main/java/com/alibaba/otter/canal/client/adapter/es/support/ESSyncUtil.java

@@ -209,7 +209,7 @@ public class ESSyncUtil {
                     if (value.contains(";")) {
                         separator = ";";
                     } else if (value.contains("|")) {
-                        separator = "|";
+                        separator = "\\|";
                     } else if (value.contains("-")) {
                         separator = "-";
                     }