Add container metric
Add container metric

Change applicationId from UUID to string

[#83693648]

Signed-off-by: John Tuley <b62d404e513eecfa92cb060d3427723b1e04fc4e@pivotal.io>

stefanschneider/dropsonde-protocol,stefanschneider/dropsonde-protocol,cloudfoundry/dropsonde-protocol