Fix tests discovered on MacOS

Incorrectly had:
	 sync.Ounce{}.Do(procflags)
	 sync.Ounce{}.Do(WriteConfigs)

This worked on Linux but discovered that it only supports one wrapped
function.
	 sync.Ounce{}.Do(srvTestSetup)

Signed-off-by: Tom Grennan <tom@apptimist.co>
update README and add notes for running with MacOS

Signed-off-by: Tom Grennan <tom@apptimist.co>