support functions in QueryThenFetchTask

removes LocalMerge with TopN projection from qtf-plans
remove PlannerFunctionArgumentCopier

became unused with fe468cf64b6407fd1b2e06d90927fb3322923dd4
update elasticsearch to 1.4.0
Merge pull request #1362 from crate/j/es140

update elasticsearch to 1.4.0
changelog entry for commit 99854814bd4dc7bc529526992dfdb42ef01750aa
correctly handle empty clustered by values or values containing commas

as elasticsearch misinteprets empty string or strings containing commas
do not use these as routing for requests
updated crate-admin to 0.10.2
updated changelog to reflect release 0.45.5
stop node and sqlservice in SQLServiceTest
Merge pull request #1365 from crate/m/thread_leak_tests

stop node and sqlservice in SQLServiceTest
WIP circuit breaker