fix(rds): deploy fails with "SubnetGroup not found" #13986
Merged
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As it turns out, RDS stores the name of the SubnetGroup in lowercase on the server-side.
The problem is that we weren't changing the case in CloudFormation,
and thus expressions like
{ Ref: SubnetGroup }
were using the wrong casing,resulting in the RDS service failing with a 404 error when providing a name for the SubnetGroup.
Fixes #13976
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