[zoodiscovery] Remote service undiscovered and not
rediscovered due to concurrency bug 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=337973

Fixed ReadRoot to better support concurrency and added some
documentation to IService which is not related to this bug.

Signed-off-by: Wim Jongman <wim.jongman@remainsoftware.com>
2 files changed