FlatFileParser should check section header regexp before ignore regexp in hasMoreData method

[Nicklas Nordborg]

The FlatFileParser.hasMoreData() method is not consistent with the FlatFileParser.parseHeaders() method. While parsing a line the latter method check if the line matches the section regular expression before the ignore regular expression, but the former method does it in the other order. In some cases, this may lead to difficulties to write code that matches a new section correctly depending on where it appears in a file. To make the parsing more predicable the section regular expression should be checked first on both cases.

[Nicklas Nordborg]

(In [6458]) Fixes #1807: FlatFileParser? should check section header regexp before ignore regexp in hasMoreData method