OPENNLP-1644: Add missing opennlp-tools-models to opennlp-distr

[mawiesne]

Change

• declares opennlp-tools-models as a dependency for opennlp-distr
• adds filesets to bin.xml ensuring opennlp-tools-models/apidocs and opennlp-dl/apidocs are included in the bin archives
• improves formatting of the changed files

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