[DOC] Fix default values for filter cache size and field data circuit breaker.

Relates to #5990
[DOCS] Update phrase-suggest.asciidoc

Grammatical error

Close #5993
[DOCS] Update client.asciidoc

Should be classpath rather than classloader.

Close #5965
[DOCS] Fixed a typo

Close #5963
[DOCS] Update service.bat

corrected typo, Exiting instead of Existing

Close #5885
[TEST] Random dynamic templates.

This change randomly indexes the _id field and randomizes field data formats
and loading.

Close #5834
[TESTS] Don't randomize mappings in SimpleValidateQueryTests.

This test relies on the fact that the _id field is not indexed.
Remove RootMapper.validate and validate the routing key up-front.

RootMapper.validate was only used by the routing field mapper, which makes
buggy assumptions about how fields are indexed. For example, it assumes that
the index representation of a field is the same as its external representation.

Close #5844
Made it mandatory to specify IndicesOptions when calling MetaData#concreteIndices

Removed MetaData#concreteIndices variations that didn't require an IndicesOptions argument. Every caller should specify how indices should be resolved to concrete indices based on the indices options argument.

Closes #6059