[camel-extra] Changed parent version to 2.10-SNAPSHOT

[Henryk Konsek]

In rev932 I set parent version to 2.10-SNAPSHOT as we do not want to
be dependent on the "future" version of Camel (it was 2.10.1 release
version).

-- 
Henryk Konsek
http://henryk-konsek.blogspot.com