Provision mysql database fails with "data too long" error

[basiszwo]

When creating a mysql service with an extensive list of provisioning parameters we get an error as follows:

Service broker error: Error saving provision request details to database: Error 1406: Data too long for column 'request_details' at row 1. Services relying on async provisioning will not be able to complete provisioning

After a bit of investigation I found a pull request where @josephlewis42 points out the underlying issue

Some of our datatypes are suspect, like links only having space for 255 characters when the de-facto standard is ~2000 or RequestDetails which is serialized JSON being a varchar(255)

My opinion is that it doesn't make that much sense to use varchar(255) for a column that is supposed to hold json data.

We should switch the column to text in order to take the marshalled json config.