Support the google-chrome --lang argument

[pearj]

I need to be able to specify the google chrome lang by doing something like this:

DesiredCapabilities desiredCapabilities = DesiredCapabilities.chrome();
ChromeOptions options = new ChromeOptions();
options.addArguments("lang=en_GB");
desiredCapabilities.setCapability(ChromeOptions.CAPABILITY, options);

Apparently, the valid --lang args are specified here: https://developer.chrome.com/extensions/i18n#locales-testing

However, due to some weird ubuntu/debian issue you need to specify the language as an environment variable instead LANGUAGE.

This can be easily rectified in the google-chrome wrapper script. I will submit a PR for this.

Operating System

• I provided my operating system name and version, e.g. output of uname -a
  Linux poc-docker05.aipo.gov.au 3.10.0-514.6.1.el7.x86_64 Retrieve logs #1 SMP Sat Dec 10 11:15:38 EST 2016 x86_64 x86_64 x86_64 GNU/Linux

Image version

• I have latest version of this image. Upgrade with docker pull elgalu/selenium

• If I don't have latest version of this image and can't upgrade, I will specify which one I'm using.

Docker version

• I have latest version of docker and I will specify here the output of docker --version

• If I don't have latest version of docker I will specify which version with docker --version output
  Docker version 1.12.5, build 047e51b/1.12.5
  Running inside OpenShift (Kubernetes):

• oc v1.4.1+3f9807a
• kubernetes v1.4.0+776c994