[ML] Unmute data frame analytics stop-and-restart tests (#70495)

This commit unmutes outlier detection, classification and
regression stop-and-restart tests as it now seems that
all problems reported in #67581 have been fixed.

Closes #67581

x-pack/plugin/ml/qa/native-multi-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/ml/integration/ClassificationIT.java

@@ -51,7 +51,6 @@ import org.elasticsearch.xpack.core.ml.inference.TrainedModelConfig;
 import org.elasticsearch.xpack.core.ml.inference.preprocessing.OneHotEncoding;
 import org.elasticsearch.xpack.core.ml.inference.preprocessing.PreProcessor;
 import org.junit.After;
-import org.junit.Before;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -103,25 +102,9 @@ public class ClassificationIT extends MlNativeDataFrameAnalyticsIntegTestCase {
     private String destIndex;
     private boolean analysisUsesExistingDestIndex;
 
-    @Before
-    public void setupLogging() {
-        client().admin().cluster()
-            .prepareUpdateSettings()
-            .setTransientSettings(Settings.builder()
-                .put("logger.org.elasticsearch.xpack.ml.dataframe.inference", "DEBUG")
-                .put("logger.org.elasticsearch.xpack.core.ml.inference", "DEBUG"))
-            .get();
-    }
-
     @After
     public void cleanup() {
         cleanUp();
-        client().admin().cluster()
-            .prepareUpdateSettings()
-            .setTransientSettings(Settings.builder()
-                .putNull("logger.org.elasticsearch.xpack.ml.dataframe.inference")
-                .putNull("logger.org.elasticsearch.xpack.core.ml.inference"))
-            .get();
     }
 
     @Override
@@ -491,7 +474,6 @@ public class ClassificationIT extends MlNativeDataFrameAnalyticsIntegTestCase {
             "classification_training_percent_is_50_boolean", BOOLEAN_FIELD, BOOLEAN_FIELD_VALUES, "boolean");
     }
 
-    @AwaitsFix(bugUrl="https://github.com/elastic/elasticsearch/issues/67581")
     public void testStopAndRestart() throws Exception {
         initialize("classification_stop_and_restart");
         String predictedClassField = KEYWORD_FIELD + "_prediction";

x-pack/plugin/ml/qa/native-multi-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/ml/integration/RunDataFrameAnalyticsIT.java

@@ -50,25 +50,9 @@ import static org.hamcrest.Matchers.nullValue;
 
 public class RunDataFrameAnalyticsIT extends MlNativeDataFrameAnalyticsIntegTestCase {
 
-    @Before
-    public void enableLogging() {
-        client().admin().cluster()
-            .prepareUpdateSettings()
-            .setTransientSettings(Settings.builder()
-                .put("logger.org.elasticsearch.xpack.ml.action", "DEBUG")
-                .put("logger.org.elasticsearch.xpack.ml.dataframe", "DEBUG"))
-            .get();
-    }
-
     @After
     public void cleanup() {
         cleanUp();
-        client().admin().cluster()
-            .prepareUpdateSettings()
-            .setTransientSettings(Settings.builder()
-                .putNull("logger.org.elasticsearch.xpack.ml.action")
-                .putNull("logger.org.elasticsearch.xpack.ml.dataframe"))
-            .get();
     }
 
     public void testOutlierDetectionWithFewDocuments() throws Exception {
@@ -616,7 +600,6 @@ public class RunDataFrameAnalyticsIT extends MlNativeDataFrameAnalyticsIntegTest
             "Stopped analytics");
     }
 
-    @AwaitsFix(bugUrl="https://github.com/elastic/elasticsearch/issues/67889")
     public void testOutlierDetectionStopAndRestart() throws Exception {
         String sourceIndex = "test-outlier-detection-stop-and-restart";