made sentry config for prod only (#1417)

added monolog example config to omit confusion

sentry/sentry-symfony/3.0/config/packages/prod/sentry.yaml

@@ -0,0 +1,22 @@
+sentry:
+    dsn: '%env(SENTRY_DSN)%'
+    options:
+        excluded_exceptions:
+            - Symfony\Component\HttpKernel\Exception\NotFoundHttpException
+            - Symfony\Component\Security\Core\Exception\AccessDeniedException
+
+    # If you are using Monolog, you also need these additional configuration and services to log the errors correctly:
+    # https://docs.sentry.io/platforms/php/guides/symfony/#monolog-integration
+    # register_error_listener: false
+
+    # monolog:
+    #    handlers:
+    #        sentry:
+    #            type: service
+    #            id: Sentry\Monolog\Handler
+
+    # services:
+    #    Sentry\Monolog\Handler:
+    #        arguments:
+    #           $hub: '@Sentry\State\HubInterface'
+    #            $level: !php/const Monolog\Logger::ERROR

sentry/sentry-symfony/3.0/config/packages/sentry.yaml

@@ -1,2 +0,0 @@
-sentry:
-    dsn: '%env(SENTRY_DSN)%'

sentry/sentry-symfony/3.0/manifest.json

@@ -1,6 +1,6 @@
 {
     "bundles": {
-        "Sentry\\SentryBundle\\SentryBundle": ["all"]
+        "Sentry\\SentryBundle\\SentryBundle": ["prod"]
     },
     "copy-from-recipe": {
         "config/": "%CONFIG_DIR%/"