bug: ensure tika extracts embedded doc with a stream

[pirhoo]

No description provided.

[bamthomas]

the result of extraction is stored into TikaDocumentSource class :

public class TikaDocumentSource {
    public final Metadata metadata;
    public final byte[] content;

    public TikaDocumentSource(final Metadata metadata, final byte[] content) {
        this.metadata = metadata;
        this.content = content;
    }
}

And is is used in SourceExtractor class.

The content should not be stored as an array of byte but as an InputStream (or subclass).

[mvanzalu]

No solution for disk issue for the moment