Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
not permitted.)
Parameters:
name - the name of the enum constant to be returned.
Returns a Region object representing the region the application is
running in, when running in EC2. If this method is called from a non-EC2
environment, it will return null.