Changes in standalone.conf is not applied

Changes in standalone.conf is not applied while running

## Environment details:

* ubuntu
* version 18.04

## Steps to reproduce the issue:

1. vim ./core/standalone/src/main/resources/standalone.conf
added host name in standalone
...
standalone {
host {
name = "0.0.0.0"
}
...

2. gradle core:standalone:bootRun

## Provide the expected results and outputs:

```
...
================================================================================
Launched service details

[ 3233 ] http://0.0.0.0:3233 (Controller)
[ 3232 ] http://0.0.0.0:3232/playground (Playground)

Local working directory - /users/kab076/.openwhisk/standalone/server-3233
================================================================================
...
```

## Provide the actual results and outputs:

```
...
================================================================================
Launched service details

[ 3233 ] http://172.17.0.1:3233 (Controller)
[ 3232 ] http://172.17.0.1:3232/playground (Playground)

Local working directory - /users/kab076/.openwhisk/standalone/server-3233
================================================================================

...
```

Start with core/standalone/src/main/resources/standalone.conf and run gradle core:standalone:bootRun using the reported host.name setting. Trace how standalone.conf is loaded and how the launched service details obtain the host address. Done means the configured 0.0.0.0 value appears for the Controller and Playground endpoints.

Written by the indexing model from the issue text.