add new test with flattened result json.

filebeat/module/haproxy/http/test/haproxy.log

@@ -0,0 +1 @@
+Jul 30 09:03:52 localhost haproxy[32450]: 1.2.3.4:38862 [30/Jul/2018:09:03:52.726] incoming~ docs_microservice/docs 0/0/1/0/2 304 168 - - ---- 6/6/0/0/0 0/0 {docs.example.internal||} {|||} "GET /component---src-pages-index-js-4b15624544f97cf0bb8f.js HTTP/1.1"

filebeat/module/haproxy/http/test/haproxy.log-expected.json

@@ -0,0 +1,41 @@
+[
+    {
+        "haproxy.server_name": "docs",
+        "haproxy.time_client_req": 0,
+        "haproxy.geoip.continent_name": "North America",
+        "haproxy.geoip.city_name": "Mukilteo",
+        "haproxy.geoip.country_iso_code": "US",
+        "haproxy.geoip.region_name": "Washington",
+        "haproxy.geoip.location.lon": -122.3042,
+        "haproxy.geoip.location.lat": 47.913,
+        "haproxy.termination_state": "----",
+        "haproxy.time_queue": 0,
+        "haproxy.pid": 32450,
+        "haproxy.client_port": 38862,
+        "haproxy.backend_queue": 0,
+        "haproxy.process_name": "haproxy",
+        "haproxy.backend_name": "docs_microservice",
+        "haproxy.http.request.raw_request_line": "GET /component---src-pages-index-js-4b15624544f97cf0bb8f.js HTTP/1.1",
+        "haproxy.http.request.captured_cookie": "-",
+        "haproxy.http.request.captured_headers": [
+            "docs.example.internal"
+        ],
+        "haproxy.http.response.captured_cookie": "-",
+        "haproxy.http.response.captured_headers": [],
+        "haproxy.http.response.status_code": 304,
+        "haproxy.http.response.bytes_read": 168,
+        "haproxy.frontend_name": "incoming~",
+        "haproxy.time_duration": 2,
+        "haproxy.time_server_response": 0,
+        "haproxy.server_queue": 0,
+        "haproxy.client_ip": "1.2.3.4",
+        "haproxy.time_backend_connect": 1,
+        "haproxy.connections.server": 0,
+        "haproxy.connections.retries": 0,
+        "haproxy.connections.active": 6,
+        "haproxy.connections.backend": 0,
+        "haproxy.connections.frontend": 6,
+        "@timestamp": "2018-07-30T09:03:52.726Z",
+        "message": "Jul 30 09:03:52 localhost haproxy[32450]: 1.2.3.4:38862 [30/Jul/2018:09:03:52.726] incoming~ docs_microservice/docs 0/0/1/0/2 304 168 - - ---- 6/6/0/0/0 0/0 {docs.example.internal||} {|||} \"GET /component---src-pages-index-js-4b15624544f97cf0bb8f.js HTTP/1.1\""
+    }
+]