Use hadoop-1.0.0 as basis for default Flume build instead of 0.20.205

Simple maven cleanup task to not depend on hadoop-0.20.205.0 for the default build. We should just use hadoop-1.0.0 which is the same thing as hadoop-0.20.205.1

This way we only have two profiles: one for 1.0 and the other for 0.23, which are significantly different enough from a packaging & test perspective to warrant their own build profiles.