Feature - Elasticsearch connector improvement - dynamic filtering ES query

[jimPeill]

The WHERE clause in the SQL query is translated as a "bool - filter" ES query.
However, that "bool filter" query only works on Keyword and indexed fieds in ES.

Requirements:
To improve the ES connector with a dynamic filtering query, depending on the field type, in order to make the right ES query:

• type keyword and indexed : ES query using "bool filter" (behavior as of today)
• type keyword and non indexed or type Text : ES query using"query match" or "query multi-match" if several WHERE clauses in the SQL query