Start wait url does not support user information in URL

[tdomzal]

Currently wait option times out always when you try to refer to protected URL.
Specifying user auth info in URL does not make any difference.

I added some logging to HttpPingChecker and reason is http error 401:

...
[DEBUG] DOCKER> wait url 'http://user:pass@host/someurl' exception: Read timed out
[DEBUG] DOCKER> wait url 'http://user:pass@host/someurl' response code: 401
...

WaitUtil.HttpPingChecker uses java.net.HttpURLConnection and this is probable reason.

I think there are two options to allow user auth info:

• use apache HttpClient lib which support user info by default (library is already in plugin depedencies).
• keep using java.net.HttpURLConnection but:
  • extend configuration with authorization user / password (required configuration format change), or
  • extract auth info from specified url before using it.

I tested HttpClient option and can supply pull request for that.