Update the installer to ensure it uses a fully functional ECF http client provider

[merks]

See the following for background details:

eclipse-equinox/p2#381

Investigate the changes need in Oomph to ensure that the installer works in proxy environments.

[merks]

@SebasHein

The latest nightly installers should use the older provider implementation by default.

https://download.eclipse.org/justj/?file=oomph/products/latest

It would be awesome if you could confirm that this installer works for you in your network environment. Tomorrow I will build Oomph's m3 milestone which will be the same as the currently nightly installer...

[SebasHein]

@merks : I did two things:
1st: download the nightly build of eclipse installer as suggested above. And I can state that for our environment it works again.
Thanks a lot for your support!
2nd: I also downloaded what you suggested here issue #76
With P2, ECF and Oomph products installed.
Question is do you still need that I do tests with the update site you provided or is that no longer necesarry with the provided nightly build?

Sorry again for my late answer. I am very busy at the moment but give my best to test as soon as possible.

[merks]

Yeah, we're done here. Thanks for reporting the problem in time and for testing!