NXP-15826: Provide a way to reindex document that match a NXQL query, index document by bucket using a bulk ES api.
NXP-15409 fixing elastic test dependencies
NXP-15826 NXP-15677: Impl multi repositories reindex, add a drop index option
NXP-16105 configure TestReindex in elastic search as random bug
NXP-15826: Improve the indexing actions, reindexing the entire repo performs a drop index, recursive reindexation try to clean the index first
NXP-16105: Don't assume that the number of docs is always the same because of NXP-16154
Code clean: Update junit4 Assert import
NXP-16188: When doc id is null try to reload the document from its path
NXP-16090: format
Merge branch '6.0' of github.com:nuxeo/nuxeo into 6.0