To avoid empty volumes like:
{
(...)
"volumes": [
"/etc/puppet:/etc/puppet:ro",
(...)
"",
""
],
}
Replace '' by [], so heat won't create an item in the list.
It helps to have idempotent containers, since podman_container module
will compare the list of volumes that is given in parameters (containing
the empty entries) vs the list of volumes actually in podman inspect.
Replacing to [] clears out empty volumes and makes these containers
idempotent when podman_container module is used to deploy containers.
Change-Id: I228b01009e7d9980bee5480778dbc88b9e226297