fix 'too many connection resets' error that may occur during ci tests

by lowering POST timeouts to 1.

From Net::HTTP::Persistent history.txt:
"Reducing the idle timeout is preferred
 over setting #retry_change_requests to true if you wish to avoid the "too
 many connection resets" error when POSTing data."

spec/integration/net_http_persistent_spec.rb

@@ -37,7 +37,9 @@
     end
 
     it "executes POST requests" do
-      response = HTTPI.post(@server.url, "<some>xml</some>", adapter)
+      request = HTTPI::Request.new(url: @server.url, open_timeout: 1, read_timeout: 1, body: "<some>xml</some>")
+
+      response = HTTPI.post(request, adapter)
       expect(response.body).to eq("post")
       expect(response.headers["Content-Type"]).to eq("text/plain")
     end