Change HAProxy plugin tag from host to server

fixes #342

CHANGELOG.md

@@ -6,6 +6,7 @@ changed to just run docker commands in the Makefile. See `make docker-run` and
 `make docker-kill`. `make test` will still run all unit tests with docker.
 - Long unit tests are now run in CircleCI, with docker & race detector
 - Redis plugin tag has changed from `host` to `server`
+- HAProxy plugin tag has changed from `host` to `server`
 
 ### Features
 - [#325](https://github.com/influxdb/telegraf/pull/325): NSQ output. Thanks @jrxFive!

plugins/haproxy/haproxy.go

@@ -165,9 +165,9 @@ func importCsvResult(r io.Reader, acc plugins.Accumulator, host string) ([][]str
 
 		for field, v := range row {
 			tags := map[string]string{
-				"host":  host,
-				"proxy": row[HF_PXNAME],
-				"sv":    row[HF_SVNAME],
+				"server": host,
+				"proxy":  row[HF_PXNAME],
+				"sv":     row[HF_SVNAME],
 			}
 			switch field {
 			case HF_QCUR:

plugins/haproxy/haproxy_test.go

@@ -42,9 +42,9 @@ func TestHaproxyGeneratesMetricsWithAuthentication(t *testing.T) {
 	require.NoError(t, err)
 
 	tags := map[string]string{
-		"host":  ts.Listener.Addr().String(),
-		"proxy": "be_app",
-		"sv":    "host0",
+		"server": ts.Listener.Addr().String(),
+		"proxy":  "be_app",
+		"sv":     "host0",
 	}
 
 	assert.NoError(t, acc.ValidateTaggedValue("stot", uint64(171014), tags))
@@ -109,9 +109,9 @@ func TestHaproxyGeneratesMetricsWithoutAuthentication(t *testing.T) {
 	require.NoError(t, err)
 
 	tags := map[string]string{
-		"proxy": "be_app",
-		"host":  ts.Listener.Addr().String(),
-		"sv":    "host0",
+		"proxy":  "be_app",
+		"server": ts.Listener.Addr().String(),
+		"sv":     "host0",
 	}
 
 	assert.NoError(t, acc.ValidateTaggedValue("stot", uint64(171014), tags))