Fix the server specs: the gateway is on port 8080 by default

site-cookbooks/ipfs/test/integration/default/serverspec/ipfs_spec.rb

@@ -14,8 +14,8 @@ describe "IPFS" do
     expect(port(4001)).to be_listening
   end
 
-  it "is listening on port 9090 (gateway)" do
-    expect(port(9090)).to be_listening
+  it "is listening on port 8080 (gateway)" do
+    expect(port(8080)).to be_listening
   end
 
   it "has a running service of ipfs" do