avoid multiple builds and make sure clean target cleans maven build too

Change-Id: I428e537092bdae91122345cb0b6b16598b69bf9d
Added dependency on protobuf 2.5.0 for building libjn-client
Removed hardcoded path for curlpp include directory

Change-Id: If9409a95167e7f0de873a0781bc9ed7933688065
Merge branch 'branch-qjm-ice' of github.com:psarda/apache-hadoop into branch-qjm-ice