better timeout handling waiting for primary to be active for indexing
take into account the correct delta timeout when scheduling it, since now we can retry again after removing a listener
Fixed concurrency issue in simple id cache. The lget() of a map can only be used if the map isn't shared.
Fixed delete mapping to return acknowledged false when ack times out
[DOCS] Typo on shingle tokenfilter
Removed needless concreteIndices call, already called in doExecute and set to the request object
The mpercolate api rest endpoint should also support http get.
Fixed bug (NPE) in mpercolate api, defaults from percolating existing documents where also applied for the regular percolate api, these defaults were none existing (null).
Randomize exceptions when file is deleted while still open.

This somehow emulates a behavior on windows but we should test the
other code paths as well.