Hadoop profile names should be consistent across branches

ACCUMULO-1419 changed the hadoop pofile names to reflect the major components used. This makes documenting how to build against a major hadoop line across all of our branches more difficult than necessary.

Since the changes in what we need to do vary with the Hadoop line, e.g. Hadoop 1 and Hadoop 2, we should name them appropriately.

Additionally, our current activation scheme for hte default doesn't allow activating it by name.