Related: #i124106# correct handling of page break attributes

i.e. those which are providing the default value explicitly

(cherry picked from commit 5a15ef3da683566d7bd443f96eeec3a9a3f70aeb)

Conflicts:
	writerfilter/source/dmapper/DomainMapper.cxx
	writerfilter/source/dmapper/PropertyMap.cxx

(cherry picked from commit c30fb7d7269b5bdd1853ac22120f57aa2bfd13a5)

Change-Id: Ib8721f2fce060d26ee75b0515b3bf62a603fd40c
Signed-off-by: Miklos Vajna <vmiklos@collabora.co.uk>