Prometheus PUSH example in Go

Running and integrating

APM connector:

$ cd connectors/apm-connector
$ go build
$ ./apm-connector

Prometheus Golang PUSH tool:

$ cd examples/prometheus/push/go
$ go build
$ ./go -foundationUrl=http://... -user=RESTAPIUSER -password=**** -gwosAppName=GW8

Prometheus Golang PUSH tool HELP:

$ ./go -h