This article was originally published online on 25 September 2017. Due to a production error, in the originally published version the heading of the third column of Table I appeared as "φ/[O]" (i.e., with an open circle). Tφhe correct expression is "φ/[º]" (i.e., with a degree sign). AIP Publishing apologizes for this error. All online versions of the article were corrected on 29 September 2017 and it appears correctly in print.