Character set should be utf8mb4

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I notice when I use the Openshift MySQL cartridge, that the character set is set to utf8. This is understandable as MySQL really made a mess here, but it really should be utf8mb4 as the utf8 that MySQL talks about is really a MySQL utf8...

Real utf8 has max. 4 bytes per character
MySQL utf8 has only 3 bytes per character and can't encode all of Unicode

If you want full Unicode support (and who doesn't) you should set the character set to utf8mb4 in MySQL.

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I found this cartridge:

openshift-origin-cartridge-mysql-utf8mb4

So it looks like someone already worked on this... Maybe you can use that?

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See also:
https://bugzilla.redhat.com/show_bug.cgi?id=1186681