[tycho-dev] please use juno m2+ for tycho work

[Igor Fedorenko <igor@xxxxxxxxxxxxxx>]

There was a change in the way eclipse maintains .prefs files in juno m2
[1]. As a result, working on Tycho sources with Juno results in quite
annoying outgoing changes in many .prefs files. Since Tycho depends on
Juno p2, I think it makes sense to require Juno as Tycho IDE as well. I
pushed corresponding changes to git.eclipse.org, so if prefer to keep
using earlier eclipse version make sure not to commit changes to .prefs
files.

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=342709


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Regards,
Igor