[ZOOKEEPER-4831] update slf4j from 1.x to 2.0.13, logback to 1.3.14 (#2162)

pom.xml

@@ -550,8 +550,8 @@
     <redirectTestOutputToFile>true</redirectTestOutputToFile>
 
     <!-- dependency versions -->
-    <slf4j.version>1.7.30</slf4j.version>
-    <logback-version>1.2.13</logback-version>
+    <slf4j.version>2.0.13</slf4j.version>
+    <logback-version>1.3.14</logback-version>
     <audience-annotations.version>0.12.0</audience-annotations.version>
     <jmockit.version>1.48</jmockit.version>
     <junit.version>5.6.2</junit.version>

zookeeper-docs/src/main/resources/markdown/zookeeperAdmin.md

@@ -436,7 +436,7 @@ in the unlikely event a recent log has become corrupted). This
 can be run as a cron job on the ZooKeeper server machines to
 clean up the logs daily.
 
-    java -cp zookeeper.jar:lib/slf4j-api-1.7.30.jar:lib/logback-classic-1.2.10.jar:lib/logback-core-1.2.10.jar:conf org.apache.zookeeper.server.PurgeTxnLog <dataDir> <snapDir> -n <count>
+    CLASSPATH='lib/*:conf' java org.apache.zookeeper.server.PurgeTxnLog <dataDir> <snapDir> -n <count>
 
 
 Automatic purging of the snapshots and corresponding

zookeeper-server/src/main/resources/LICENSE.txt

@@ -210,6 +210,6 @@ This distribution bundles jline 2.14.6, which is available under the
 2-clause BSD License. For details, see a copy of the license in
 lib/jline-2.14.6.LICENSE.txt
 
-This distribution bundles SLF4J 1.7.30, which is available under the MIT
+This distribution bundles SLF4J 2.0.13, which is available under the MIT
 License. For details, see a copy of the license in
-lib/slf4j-1.7.30.LICENSE.txt
+lib/slf4j-2.0.13.LICENSE.txt

zookeeper-server/src/test/java/org/apache/zookeeper/test/ReconfigExceptionTest.java

@@ -48,7 +48,7 @@ public class ReconfigExceptionTest extends ZKTestCase {
     // Use DigestAuthenticationProvider.base64Encode or
     // run ZooKeeper jar with org.apache.zookeeper.server.auth.DigestAuthenticationProvider to generate password.
     // An example:
-    // java -cp zookeeper.jar:lib/slf4j-api-1.7.30.jar:lib/logback-classic-1.2.10.jar:lib/logback-core-1.2.10.jar:conf
+    // CLASSPATH='lib/*:conf' java
     // org.apache.zookeeper.server.auth.DigestAuthenticationProvider super:test
     // The password here is 'test'.
     private static String superDigest = "super:D/InIHSb7yEEbrWz8b9l71RjZJU=";