ODL 8.0.0-preview.3 release

What's Changed

• Rename IBaseEntityType.Context to DataServiceContext by @habbes in #2952
• Update scale variable to lower case by @ElizabethOkerio in #2905
• Add UseDefault property to IEdmVocabularyAnnotation by @ElizabethOkerio in #2935
• Refactor ODataError, ODataErrorDetail and ODataInnerError classes by @gathogojr in #2957
• FIx #2969 targetPath with collection nav props and add test. (#2970) by @habbes in #2986
• Fix grouping by nested dynamic property to behave like grouping by nested standard property by @habbes in #2987
• Avoid evaluating Current on an empty enumerator (#2974) by @habbes in #2988

Full Changelog: 8.0.0-preview.2...8.0.0-preview.3