Find all usage of RestAssured and create proxy properties for each

[ham1]

Describe the Issue We currently just have one option to specify a proxy (-Dproxy) and this sets it for Selenium (browsers) as well as all instances of RestAssured. This might not suit all network set ups. e.g. If your SUT needs a proxy but your Jira doesn't. Or if your UI needs a proxy but your API tests don't.

Expected Behaviour A file or set of fine grained options for setting the proxy for each use case.