Fix error with the MetaDict class where it would loose the order of the input OrderedDict object. This is an error present in the original MapMeta class that will be fixed in a seperate PR.
Fix error with the MetaDict class where it would loose the order of the input OrderedDict object.
This is an error present in the original MapMeta class that will be fixed in a seperate PR.

dpshelio/sunpy,dpshelio/sunpy,dpshelio/sunpy