bug: default JSON decoding should not use string

[JulienPeloton]

The function

@profile
def hbase_to_dict(hbase_output, escape_slash=False):
    """Optimize hbase output TreeMap for faster conversion to DataFrame"""
    gateway = JavaGateway(auto_convert=True)
    JSONObject = gateway.jvm.org.json.JSONObject

    # We do bulk export to JSON on Java side to avoid overheads of iterative access
    # and then parse it back to Dict in Python
    if escape_slash:
        hbase_output = str(hbase_output)
    optimized = json.loads(JSONObject(str(hbase_output)).toString())

    return optimized

should not have str(hbase_output) by default when calling JSONObject (only used when escaping slashes).

[JulienPeloton]

See also #12