Create a Put HBase processor that can put multiple cells

We recently added a PutHBaseCell processor which works great for writing one individual cell at a time, but it can require a significant amount of work in a flow to create a row with multiple cells.

We should support a variation of this processor that can accept a flow file with key/value pairs in the content of the flow file (possibly json). The key/value pairs then turned into the cells for the given row and get added in one put operation.