fixed load_json

[AlahmadiQ8]

“Set Json Value” Keyword always fails when supplied a string that is not “true” or “false” because json.dumps() in load_json cannot encode str to json.

if json.dumps() loads an error, then just return json_string.

Test Case

Set Json Value     {}    /testing   true  # always worked since json.dumps(‘true’) is valid 
Set Json Value   {}   /testing2   some_str   # was failing because json.dumps(‘some_str’) throws an error

[vikulin]

This method will be broken if I apply your change:
`
def parse_json(self, json_string):

    """

    Parses the JSON document `json_string` and returns a data structure.

    Example:

    | ${result}=       | Parse Json  | [1, 2, 3] |

    | Length Should Be | ${result}   | 3         |

    `json_string` is the string containg JSON that will be parsed

    """

return load_json(json_string)`

Please rewrite your change specifically for this method:

def set_json_value(self, json_string, json_pointer, json_value):

[AlahmadiQ8]

@vikulin done. please check my last commit 67f1b2b