* master:
Use releasable locks in NativeRolesStore
security: limit the size of the role store cache
security: remove explicit handshake wait in netty4 transport
test: smoke-test-plugins-ssl no longer relies on logging to start
kibana monitoring/uuid config key reference update
Docs: Updated release date for 2.4 in RNs.
Update README.md
Build: Add apijar task to assemble so it gets built with other artifacts
monitoring ui/license: cluster listing status cell treatment for basic/unsupported cluster
monitoring ui:fix cluster overview when cluster has no indices/shards
monitoring ui/license: logic cleanup per feedback
monitoring ui/license: primary cluster asterisk styling
monitoring ui/license: allow clicking into primary cluster if all are basic
monitoring ui: add isPrimary property to cluster listing response
Security: throw exception if we cannot extract indices from an indices request
Security: add tests for delete and update by query
Original commit: elastic/x-pack-elasticsearch@3cb41739ee