Be more permissive with Gitaly's connections (for the moment)

Gitaly is still in an early stage. Many installations won't have it
enabled at this stage. We still want the wiring, but for now we'll
prefer to fail fast, until Gitaly is more developed and made a mandatory
part of GitLab installations.

lib/gitaly_client.rb

@@ -11,7 +11,8 @@ class GitalyClient < HttpClient
     url = "#{gitaly_url}/post-receive"
     params = { project: sanitize_path(repo_path) }
-    resp = post(url, params)
+    # NOTE: Consider being more permisive with gitaly once it's more robust
+    resp = post(url, params, read_timeout: 5)
     resp.code == '200'
   end

lib/gitlab_post_receive.rb

@@ -37,7 +37,8 @@ class GitlabPostReceive
       end
       print_merge_request_links(merge_request_urls)
-      result &&= notify_gitaly
+      # NOTE: Consider checking Gitaly's success once it's robust and mandatory
+      notify_gitaly
     rescue HttpClient::ApiUnreachableError
       nil
     end

lib/http_client.rb

@@ -91,8 +91,8 @@ class HttpClient
     request(:get, url, {}, options)
   end
-  def post(url, params)
-    request(:post, url, params)
+  def post(url, params, options = {})
+    request(:post, url, params, options)
   end
   def cert_store