Add normalizer param support in _analyze API

[johtani]

Analyze API does not support normalizer param yet.
It should get normalizer param for explaining how it works.

[johtani]

It should support cases as follows:

• normalizer param only when normalizer setting in index settings
• custom normalizer param
• explain with normalizer

and some error cases:

• specify not support char_filters/filters
• normalizer param with tokenizer/analyzer