Metadata utils internalization, migration of few useful methods#2651

Merged

TomFinley merged 3 commits intodotnet:masterfrom

Feb 20, 2019

Commits on Feb 20, 2019

Creation of DataViewSchemaAnnotationsExtensions and movement of public facing metadata methods.
TomFinley
committed
Internalize MetadataUtils and MetadataBuilder extensions, and revert members to public.
TomFinley
committed
Internalize MetadataBuilderExtensions
TomFinley
committed