[leo_gateway] Can't handle http requests when cache.http_cache is set to true also protocol = rest

[mocchira]

due to the function signature mismatch like the following.

{{badarity,
  {#Fun<leo_gateway_http_commons.0.25893599>,
       [500,[{<<"connection">>,<<"keep-alive">>},{<<"server">>,<<"Cowboy">>},
             {<<"date">>,<<"Tue, 01 Mar 2016 04:06:13 GMT">>},{<<"content-length">>,"0"}],<<>>,
        {http_req,#Port<0.2155>,ranch_tcp,keepalive,<0.1583.0>,<<"PUT">>,'HTTP/1.1',{{127,0,0,1},42942},
         <<"localhost">>,undefined,8080,<<"/test_oe.txt">>,undefined,<<>>,undefined,[],
         [{<<"user-agent">>,
           <<"curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.13.1.0 zlib/1.2.3 libidn/1.18 libssh2/1.2.2">>},
          {<<"host">>,<<"localhost:8080">>},{<<"accept">>,<<"*/*">>},{<<"content-length">>,<<"17">>},
          {<<"content-type">>,<<"application/x-www-form-urlencoded">>}],
         [],undefined,[],waiting,<<"test okadd line 2">>,
         undefined,false,waiting,[],<<>>,already_called}]}},
 [{cowboy_req,response,6,[{file,"src/cowboy_req.erl"},{line,1170}]},
  {cowboy_req,reply_no_compress,8,[{file,"src/cowboy_req.erl"},{line,930}]},
  {cowboy_req,reply,4,[{file,"src/cowboy_req.erl"},{line,885}]},
  {cowboy_req,maybe_reply,2,[{file,"src/cowboy_req.erl"},{line,995}]},
  {cowboy_handler,handler_handle,4,[{file,"src/cowboy_handler.erl"},{line,117}]},
  {cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,435}]}]}