feat(database): add json data type

[MrYamous]

Part of #547 to add the json data type to the table statements

Latest versions of MySQL accept default value for json but this require a version check.
I didn't want to add this complexity (at least for this pr) as this was not done either for text type before

Do you think we should check if value provided as default is a valid json ? json_validate seems free to use as Tempest require 8.3+

[brendt]

Do you think we should check if value provided as default is a valid json ? json_validate seems free to use as Tempest require 8.3+

Yes, that makes sense!

Latest versions of MySQL accept default value for json but this require a version check.
I didn't want to add this complexity (at least for this pr) as this was not done either for text type before

Yeah we can ignore this for now :)

We should also make sure that JSON columns are eventually mapped to array properties. But that's outside the scope of this PR.

[MrYamous]

json_validate added :)
I'm not sure about the Exception name and the new test, let me know if this is suitable

[brendt]

Thanks!

[coveralls]

Pull Request Test Coverage Report for Build 11756751614

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Details

• 31 of 31 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 82.508%

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Totals
Change from base Build 11760861421:	0.06%
Covered Lines:	7283
Relevant Lines:	8827

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💛 - Coveralls