Fixes the license headers in all files in data-prepper-api. (opensearch-project#6393)

Signed-off-by: David Venable <dlv@amazon.com>

Author: dlvenable

data-prepper-api/build.gradle

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 plugins {

data-prepper-api/src/main/java/org/opensearch/dataprepper/expression/ExpressionEvaluationException.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.expression;

data-prepper-api/src/main/java/org/opensearch/dataprepper/expression/ExpressionEvaluator.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.expression;

data-prepper-api/src/main/java/org/opensearch/dataprepper/expression/ExpressionParsingException.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.expression;

data-prepper-api/src/main/java/org/opensearch/dataprepper/logging/DataPrepperMarkers.java

@@ -1,3 +1,12 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
 package org.opensearch.dataprepper.logging;
 
 import org.slf4j.Marker;

data-prepper-api/src/main/java/org/opensearch/dataprepper/metrics/MetricNames.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.metrics;

data-prepper-api/src/main/java/org/opensearch/dataprepper/metrics/PluginMetrics.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.metrics;

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/CheckpointState.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.model;

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/acknowledgements/AcknowledgementSet.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.model.acknowledgements;

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/acknowledgements/AcknowledgementSetManager.java

@@ -1,6 +1,10 @@
 /*
  * Copyright OpenSearch Contributors
  * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
  */
 
 package org.opensearch.dataprepper.model.acknowledgements;