Updated with new tests for testing recursive schemas, nested schemas and three-types unions.
HBase fix to pass those tests.

The new tests are:

DataStoreTestBase#testGetRecusive()
DataStoreTestBase#testGetDoubleRecursive()
DataStoreTestBase#testGetNested()
DataStoreTestBase#testGet3UnionField() 

git-svn-id: https://svn.apache.org/repos/asf/gora/branches/GORA_174@1459595 13f79535-47bb-0310-9956-ffa450edef68