Insertion in HBase should be fixed

* All data inserted to HBase should be String or Unicode
* Data stored in HBase is flatten

Fixes bug 1240474

Change-Id: Ic36f5460275de3c829a7b27932bde284d71bd806
assertTrue(isinstance) replace by assertIsInstance

some of tests use different method of assertTrue(isinstance(A, B))
or assertEqual(type(A), B). The correct way is to use
assertIsInstance(A, B) provided by testtools

Change-Id: I7072fef7fe5f76e526fc0ccca7a4894accaae80f
Closes-Bug: #1268480
Merge "Insertion in HBase should be fixed"
Merge "assertTrue(isinstance) replace by assertIsInstance"