add client test to check if metrics are gauged properly
add client test to check if metrics are gauged properly

Co-authored-by: Hannes Hasselbring <331be22c6b63ca3e0a03d408c2d906b1b02cd5f2@oss.volkswagen.com>
Signed-off-by: Syamala Umamaheswaran <ced1715404d81cfb20afdcdfc4a2558796773e61@oss.volkswagen.com>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse