[fix #48240295] set heartbeat value of RabbitMQ/bunny
[fix #48160213] downgrade bunny gem to 0.8.0 version
bump the version number to 1.2.2
revert back to bunny 0.9.0.pre4
Merge branch 'master_bunny0_9_with_heartbeat_0' of git://github.com/ke4/lims-api into ke4-master_bunny0_9_with_heartbeat_0

Conflicts:
	Gemfile.lock
	lib/lims-api/version.rb