Log Message:
Update net/rabbitmq to 3.5.4

- rabbitmq-env.conf.bat Support on Windows
- Fixed excessive SASL Logging on Windows
- Added warn as Alias to warning
- Added rabbitmqctl purge_queue
- Added file_handle_cache:clear_read_cache/0
- Improved rabbitmqctl Error Messages
- Kernel Polling Enabled Unconditionally by Default
- Easier I/O Thread Pool Size Configuration
- Higher I/O Thread Pool Size Default
- Improved Heartbeat Timeout Logging
- Fix: Recoverable Mirror Could Be Reset Due to Race Condition
- Fix: Throughput Regression Fix
- Fix: x-death headers can now safely be republished by clients
- STOMP: Test Suite Upgraded to Stomp.py 4.x
- STOMP: End Frame With a Newline Character