Apply the new Eclipse Kanto project license scheme

[konstantina-gramatova]

The Eclipse Kanto project is currently restructuring its license scheme - from Eclipse Public License 2.0 only to dual licensing under Eclipse Public License 2.0 and Apache License 2.0 (you can read more about it here).

The following changes must be applied to all project repositories:

• Update all copyright headers in the source files with the new copyright header:

// Copyright (c) {year} Contributors to the Eclipse Foundation
//
// See the NOTICE file(s) distributed with this work for additional
// information regarding copyright ownership.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0

• Update the License Header section of the CONTRIBUTING.md file with the new copyright header provided above
• Update the LICENSE file to be compliant with the format recommended by Eclipse:

This program and the accompanying materials are made available under the
terms of the Eclipse Public License 2.0 which is available at
https://www.eclipse.org/legal/epl-2.0, or the Apache Software License
2.0 which is available at https://www.apache.org/licenses/LICENSE-2.0.

... Text of the Eclipse Public License 2.0 ...

... Text of the Apache Software License 2.0 ...

• Update the Declared Project Licenses section of the NOTICE.md file with the new license information, i.e.:

This program and the accompanying materials are made available under the terms
of the Eclipse Public License 2.0 which is available at
https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 which
is available at https://www.apache.org/licenses/LICENSE-2.0.

SPDX-License-Identifier: EPL-2.0 OR Apache-2.0