HBase may contain only strings and unicodes.
In current implementation some entries put to db after str() or unicode(),
others are not being modified at all.
It is needed to make this process more determined. It may be achived by
creating serialize() and deserialized() methods. In these methods json library
may be used for safe work with HBase.
Partially implements bp hbase-alarming
Change-Id: If67a103e1d79d98cc93b88fe60e79c97fd17bb96