8007113: Upgrade AnnotatedElement.isAnnotionPresent to be a default method Reviewed-by: chegar, jfranck

8006295: Base64.Decoder.wrap(java.io.InputStream) returns InputStream which throws unspecified IOException on attempt to decode invalid Base64 byte stream 8006315: Base64.Decoder decoding methods are not consistent in treating non-padded data 8006530: Base64.getMimeDecoder().decode() throws exception for non-base64 character after adding = Summary: updated the spec to describe the expected behave explicitly and the implementation to follow Reviewed-by: alanb, chegar, lancea