Updates to the AWS Lambda Sink tests to fix a flaky test. Also adds S…

…LF4J logging for these tests. (opensearch-project#4723)

Signed-off-by: David Venable <dlv@amazon.com>
Signed-off-by: Krishna Kondaka <krishkdk@dev-dsk-krishkdk-2c-bd29c437.us-west-2.amazon.com>

data-prepper-plugins/lambda/build.gradle

@@ -27,6 +27,7 @@ dependencies {
     testImplementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310'
     testImplementation project(':data-prepper-test-common')
     testImplementation project(':data-prepper-plugins:parse-json-processor')
+    testImplementation testLibs.slf4j.simple
 }
 
 test {

data-prepper-plugins/lambda/src/test/java/org/opensearch/dataprepper/plugins/lambda/sink/LambdaSinkServiceTest.java

@@ -294,7 +294,7 @@ public void lambda_sink_test_batch_enabled() throws IOException {
         when(lambdaSinkConfig.getBatchOptions()).thenReturn(mock(BatchOptions.class));
         when(lambdaSinkConfig.getBatchOptions().getBatchKey()).thenReturn(batchKey);
         when(lambdaSinkConfig.getBatchOptions().getThresholdOptions()).thenReturn(mock(ThresholdOptions.class));
-        when(lambdaSinkConfig.getBatchOptions().getThresholdOptions().getEventCount()).thenReturn(maxEvents);
+        when(lambdaSinkConfig.getBatchOptions().getThresholdOptions().getEventCount()).thenReturn(1);
         when(lambdaSinkConfig.getBatchOptions().getThresholdOptions().getMaximumSize()).thenReturn(ByteCount.parse(maxSize));
         when(lambdaSinkConfig.getBatchOptions().getThresholdOptions().getEventCollectTimeOut()).thenReturn(Duration.ofNanos(10L));
         when(lambdaSinkConfig.getAwsAuthenticationOptions()).thenReturn(mock(AwsAuthenticationOptions.class));

data-prepper-plugins/lambda/src/test/resources/simplelogger.properties

@@ -0,0 +1,8 @@
+#
+# Copyright OpenSearch Contributors
+# SPDX-License-Identifier: Apache-2.0
+#
+
+org.slf4j.simpleLogger.showDateTime=true
+org.slf4j.simpleLogger.dateTimeFormat=yyyy-MM-dd' 'HH:mm:ss.SSS
+org.slf4j.simpleLogger.log.org.opensearch.dataprepper.plugins.lambda.sink=trace