[Web test] Error in Appium server: 'app' option is required for reinstall

**Operating System**
Ubuntu 18.04.1 LTS

**Docker Image**
butomo1989/docker-android-x86-8.1:1.6-p0

**Docker Version**
Docker version 17.05.0-ce, build 89658be

**Docker Command to start docker-android**
> docker run --rm --privileged -p 6080:6080 -p 4723:4723 -e DEVICE="Samsung Galaxy S6" -e AUTO_RECORD=true -e APPIUM=true -v $PWD:/tmp/video butomo1989/docker-android-x86-8.1:1.6-p0

## Expected Behavior
I want to run the following [test](https://github.com/bonigarcia/webdrivermanager-examples/blob/master/src/test/java/io/github/bonigarcia/wdm/test/AppiumTest.java) with Appium using the URL: http://localhost:4723/wd/hub

## Actual Behavior
The request reaches the Appium server in the container, but an internal error happens:

```
An unknown server-side error occurred while processing the command. Original error: 'app' option is required for reinstall
at getResponseForW3CError (/usr/lib/node_modules/appium/node_modules/appium-base-driver/lib/protocol/errors.js:826:9)
at asyncHandler (/usr/lib/node_modules/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:447:37)
```

The error can be seen in the Appium server console through noVNC: