Add support for Scala Doc header style (SCALA_STYLE)

[hsaputra]

In Scala, the format of the license header is like this:

/**
  * Copyright © 2016 eBay ([email protected])
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

the main different with JAVA_STYLE is the the new * is aligned with extra space compare to Java one.