For testing we can need to disable or change the rate of the heartbeat
Currently we have to set the value manually in each componments or
to write multiple [[post-config|$<APP>_CONF]] section in local.conf.
This change will allow to configure all componments at once with only two
lines.
Also, we don't set default values to continue to use oslo.messaging
defaults.
Change-Id: Ieaca60ca1cd6d7455b66ce490a9b023df431e9c3
7cf7a8f88f