Fix #3259 使用es索引别名时,报错Not found the mapping info of index

[clannad2000]

通过索引别名名称查询mapping信息返回的是其对应的真实索引列表信息, 故无法通过索引别名取得mapping信息.

例子: es索引: PUT tyredb-s_garage_v1 { "aliases": { "tyredb-s_garage": { "is_write_index": true } } ...

配置: esMapping: _index: tyredb-s_garage

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

:x: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...anal/client/adapter/es7x/support/ESConnection.java	0.00%	13 Missing :warning:
...anal/client/adapter/es6x/support/ESConnection.java	0.00%	11 Missing :warning:
...org/elasticsearch/client/RequestConvertersExt.java	0.00%	3 Missing :warning:
...anal/client/adapter/es6x/support/ES6xTemplate.java	0.00%	2 Missing :warning:
...g/elasticsearch/client/RestHighLevelClientExt.java	0.00%	2 Missing :warning:
...anal/client/adapter/es7x/support/ES7xTemplate.java	0.00%	2 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!