[REVIEW-3-6] Fix for fdo#55417

[Noel Power]

This makes sure alignment and protection specified at a cell style are 
exported ( basically it seems for alignment & protectecton we need the 
hard cell attributes need to match those specified in the cell style ). 
The documentation in the spec is inconclusive but after some playing 
around with what excel exports this seems to be what is required.

patch for cherry-picking is

http://cgit.freedesktop.org/libreoffice/core/commit/?id=78a102e2060a1a8fc003d91fa3193b2bfa841d26

Noel