apigateway spits out "Oops. Something went wrong. Check your URI and try again."

## Environment details:

* on my vagrant (but not seemingly limited to)

## Steps to reproduce the issue:

1. just ran `ansible-playbook -i environment/vagrant apigateway.yml`
2. and then followed `https://github.com/apache/openwhisk/blob/master/docs/apigateway.md`
3. `curl http://172.17.0.1:9001/api/23bc46b1-71f6-4ed5-8c54-816aa4f8c502/hello/world`

## Provide the expected results and outputs:

```
$ curl -k http://172.17.0.1:9001/api/23bc46b1-71f6-4ed5-8c54-816aa4f8c502/hello/world
{
"payload": "Hello world Serverless API"
}
```

## Provide the actual results and outputs:

```
$ curl -k http://172.17.0.1:9001/api/23bc46b1-71f6-4ed5-8c54-816aa4f8c502/hello/world
{"code":502, "message":"Oops. Something went wrong. Check your URI and try again."}
```

## Additional information you deem important:

For 'docker logs -f apigateway'
```
==> /var/log/api-gateway/access.log <==
172.17.0.1 - remote_user="-" [30/Jan/2020:04:41:03 +0000] request_method="GET" request_uri="/api/23bc46b1-71f6-4ed5-8c54-816aa4f8c502/hello/world" request_protocol="HTTP/1.1" status=502 bbs=84 rl=131 rt=0.005 hr="-" ua="curl/7.47.0" xfwdf="-" upadd="127.0.0.1:443" upstat=502 uprt=0.003 tenantId="23bc46b1-71f6-4ed5-8c54-816aa4f8c502" tenantNamespace="23bc46b1-71f6-4ed5-8c54-816aa4f8c502" tenantInstance="" requestHeaders="" requestBody="" responseHeaders="" responseBody="" apiId="6319ce99-8cd5-4f90-8c4c-3cef943f9f1a" apiKey="-" analyticsUri="/hello/world" reqid="uGgLLc56FKLdGQs90ScVgvzm7TARXBrW"

==> /var/log/api-gateway/gateway_error.log <==
2020/01/30 04:41:03 [error] 34#0: *50 connect() failed (111: Connection refused) while connecting to upstream, client: 172.17.0.1, server: , request: "GET /api/23bc46b1-71f6-4ed5-8c54-816aa4f8c502/hello/world HTTP/1.1", upstream: "https://127.0.0.1:443/api/v1/web/guest/default/hello.json", host: "172.17.0.1:9001"
```

In apigateway bash shell

```
# netstat -naptl
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:9000 0.0.0.0:* LISTEN 24/stderr warn;
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 24/stderr warn;
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 24/stderr warn;
tcp 0 0 127.0.0.1:8888 0.0.0.0:* LISTEN 8/api-gateway-confi
```

```
bash-4.4# curl -k https://127.0.0.1:443/api/v1/web/guest/default/hello.json
curl: (7) Failed to connect to 127.0.0.1 port 443: Connection refused
```
```
bash-4.4# curl -k https://172.17.0.1:443/api/v1/web/guest/default/hello.json
{
"payload": "Hello world Serverless API"
}
```

In a nutshell, I think the upstream in apigateway seems somewhat misconfigured. Is this a known issue? Or am I doing something wrong?