Fix SSM parameter handling with paths and queries by ARN #12116
Merged
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Motivation
SSM does not properly return parameters stored when querying it by ARN, if the parameter has a path.
We have some logic to "normalize" the parameter name before passing the call to moto, and this logic is flawed when using an ARN to get the parameter, as the normalized name only contains the last segment of the path.
Changes
get_parameter
andget_parameters
operations, if the parameter contains a path.