Add logging of message count info when messages sent to influxdb
Add logging of message count info when messages sent to influxdb

Change-Id: I8e0082c86a88d8f3c6efe184d113d8c0cbcecbce

openstack/monasca-persister,openstack/monasca-persister,stackforge/monasca-persister,stackforge/monasca-persister,stackforge/monasca-persister,openstack/monasca-persister,sapcc/monasca-persister