Add minimum configurable default tags to PrometheusReporter #92
Description
M3Reporter implementation of StatsReporter allows to set some default tags, which will be added to all reported metrics:
StatsReporter reporter = new M3Reporter.Builder(new InetSocketAddress("localhost", 9052))
.env("testing")
.service("service_name")
.includeHost(false)
.commonTags(ImmutableMap.of("tag1", "42"))
.build();
There is no such functionality in PrometheusReporter. We should add at minimum ability to set env, service and defaultTags