Topotato: Regex Json Compare Directive

[eznix86]

Usage:

compare = {
   "item": JsonCompareRegex(r"\s+"),
   "item1": JsonCompareRegex(r"\d+"),
   "item2": JsonCompareRegex("[A-Z]+"),
   "item3": JsonCompareRegex(r"^%?FRRouting/")
}

Example of errors:

E       topotato.exceptions.TopotatoCLICompareFail: json["item"] dict value is different (
E       1 vs regex '\\s+')

E       topotato.exceptions.TopotatoCLICompareFail: json["item1"] dict value is different (
E       abcd vs regex '\\d+')