Consider making @Value consistent for resource arrays and collections

[mbhave]

For Resource arrays, the ResourceArrayPropertyEditor will convert the location pattern to an array of resources. However, if @Value is present on a Collection<Resource>, you get a Resource that you then probably have to call getPath() on and use a ResourcePatternResolver to resolve that. It seems like it would be useful to make @Value consistent for resource collections and arrays.

This was originally raised in Spring Boot issue for @ConfigurationProperties. We'd like to be consistent with what Framework does for @Value.