Set non-UTC timezone for filebeat modules testing (#13874)

Using UTC timezone for filebeat modules testing hides some issues when
modifying code to parse timestamps without timezones. Use a non-UTC
timezone to facilitate the detection of this kind of issues.

Author: jsoriano

filebeat/module/apache/access/test/test-vhost.log-expected.json

@@ -1,6 +1,7 @@
 [
     {
         "@timestamp": "2016-12-26T16:22:14.000Z",
+        "destination.domain": "vhost1.domaine.fr",
         "event.dataset": "apache.access",
         "event.module": "apache",
         "fileset.name": "access",
@@ -12,7 +13,6 @@
         "input.type": "log",
         "log.offset": 0,
         "service.type": "apache",
-        "destination.domain": "vhost1.domaine.fr",
         "source.ip": "192.168.33.2",
         "url.original": "/hello",
         "user.name": "-",
@@ -24,4 +24,4 @@
         "user_agent.os.version": "10.12",
         "user_agent.version": "50.0"
     }
-]
+]

filebeat/module/apache/error/test/darwin-2.4.23.log-expected.json

@@ -1,10 +1,10 @@
 [
     {
-        "@timestamp": "2016-12-26T16:15:55.103Z",
+        "@timestamp": "2016-12-26T16:15:55.103-02:00",
         "apache.error.module": "mpm_prefork",
         "event.dataset": "apache.error",
         "event.module": "apache",
-        "event.timezone": "+00:00",
+        "event.timezone": "-02:00",
         "fileset.name": "error",
         "input.type": "log",
         "log.level": "notice",
@@ -14,11 +14,11 @@
         "service.type": "apache"
     },
     {
-        "@timestamp": "2016-12-26T16:15:55.103Z",
+        "@timestamp": "2016-12-26T16:15:55.103-02:00",
         "apache.error.module": "core",
         "event.dataset": "apache.error",
         "event.module": "apache",
-        "event.timezone": "+00:00",
+        "event.timezone": "-02:00",
         "fileset.name": "error",
         "input.type": "log",
         "log.level": "notice",