get_value and get_keys operations from io.cloudslang.base.json fail

[alex26toma]

The json_path input from get_value and get_keys operations in the io.cloudslang.base.json namespace is an optional input parameter. The problem is that if json_path is not passed to the operation, an 'NoneType' object has no attribute 'split' error will be thrown since both operations try to call the Python split() method on a null object.