Remove deprecations&cleanup

[rtroilo]

remove deprecated methods, class and some minor cleanups

removed deprecation

• OSHEntity.getRawTagKeys

- MapReducerSettings (replaced by filter)

• osmTag(String key),osmTag(OSMTagInterface tag)
• osmTag(String key, String value),
• osmTag(String key, Collection values)
• osmTag(Collection<? extends OSMTagInterface> keyValuePairs)
• osmEntityFilter(OSMEntityFilter f) (filter(Filter.byOSMEntity(...)))

Removing deprecate MapReducerSettings methods is unfortunately not straight forward, for example in
TestMapReducer.testOSMEntitySnapshotViewStream we got following query.

OSMEntitySnapshotView.on(oshdb)
  .osmType(type)
  .osmTag("highway") replace to -> filter("highway=*")
  .areaOfInterest(bbox)
  .timestamps(timestamps)
  .osmEntityFilter(entity -> entity.getId() == id)
  .groupByEntity()

will throw an

new UnsupportedOperationException(
          "groupByEntity() must be called before any `map` or `flatMap` "
              + "transformation functions have been set");

the reason for that is that filter(...) instead of osmTag(...) adds a mapping step at

oshdb/oshdb-api/src/main/java/org/heigit/ohsome/oshdb/api/mapreducer/MapReducer.java

Line 796 in 64bc0d8

ret = ret.filter(x -> {

which then conflicts with groupByEntity later on.

Checklist

• My code follows the code-style rules, and I have checked on the static analyses and benchmark (if applicable) results
• I have commented my code
• I have written javadoc (required for public classes and methods)
• I have added sufficient unit tests
• I have made corresponding changes to the documentation
• I have updated the CHANGELOG.md
• I have adjusted the examples or created an issue in the corresponding repository
• I have adjusted the benchmark or created an issue in the corresponding repository

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[joker234]

Changelog missing