Use "neutron_api" as the backend name

"neutron_api" is used instead of "neutron-api" as the backend name in the
haproxy configuration. Ideally, we should not rely on names defined in the user
configuration, but we have no solution for this right now.

Change-Id: I55be0555f04b820b1a2dec3cd453632db0bdcd9d
diff --git a/neutron/files/grafana_influxdb.json b/neutron/files/grafana_influxdb.json
index 350b304..00b0b8e 100644
--- a/neutron/files/grafana_influxdb.json
+++ b/neutron/files/grafana_influxdb.json
@@ -1234,7 +1234,7 @@
               "groupByTags": [],
               "measurement": "haproxy_backend_servers",
               "policy": "default",
-              "query": "SELECT last(\"value\") FROM \"haproxy_backend_servers\" WHERE \"environment_label\" =~ /^$environment$/ AND \"backend\" = 'neutron-api' AND \"state\" = 'up' AND $timeFilter GROUP BY time($interval) fill(null)",
+              "query": "SELECT last(\"value\") FROM \"haproxy_backend_servers\" WHERE \"environment_label\" =~ /^$environment$/ AND \"backend\" = 'neutron_api' AND \"state\" = 'up' AND $timeFilter GROUP BY time($interval) fill(null)",
               "rawQuery": false,
               "refId": "A",
               "resultFormat": "time_series",
@@ -1260,7 +1260,7 @@
                 },
                 {
                   "key": "backend",
-                  "value": "neutron-api"
+                  "value": "neutron_api"
                 },
                 {
                   "condition": "AND",
@@ -1366,7 +1366,7 @@
               "groupByTags": [],
               "measurement": "haproxy_backend_servers",
               "policy": "default",
-              "query": "SELECT last(\"value\") FROM \"haproxy_backend_servers\" WHERE \"environment_label\" =~ /^$environment$/ AND \"backend\" = 'neutron-api' AND \"state\" = 'down' AND $timeFilter GROUP BY time($interval) fill(null)",
+              "query": "SELECT last(\"value\") FROM \"haproxy_backend_servers\" WHERE \"environment_label\" =~ /^$environment$/ AND \"backend\" = 'neutron_api' AND \"state\" = 'down' AND $timeFilter GROUP BY time($interval) fill(null)",
               "rawQuery": false,
               "refId": "A",
               "resultFormat": "time_series",
@@ -1392,7 +1392,7 @@
                 },
                 {
                   "key": "backend",
-                  "value": "neutron-api"
+                  "value": "neutron_api"
                 },
                 {
                   "condition": "AND",