Merge branch 'stable'

Update test expectations

Update rabbitmq-components.mk

Merge pull request rabbitmq#1082 from rabbitmq/rabbitmq-event-exchang…

…e-10

Notify user who performed the action in all system events

Merge pull request rabbitmq#1065 from rabbitmq/rabbitmq-server-505

Topic-based authorisation for publishes

These helpers were moved to rabbitmq_ct_helpers

These helpers were moved to rabbitmq_ct_helpers

Use a less ambiguous word that does not confuse spelling checkers

Merge branch 'stable'

metrics_SUITE: Increase the timer after force_channel_stats()

The change introduced in rabbitmq/rabbitmq-common#154 to restore
compatibility with Erlang R16B03 and 17.x makes the cost of the first
call(s) to rabbit_core_metrics more expensive.

Increasing this timer allows the testsuite to succeed again.