[OWL-1698][common] Implementation of a FIFO queue
[OWL-1698][common] Implementation of a FIFO queue

The queue is for the batch updates of heartbeat requests from nqm-agents
and falcon-agents.

masato25/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend