validator: fix bugs in checking character content in foreign elements See ODF 1.2 section 3.17 Foreign Elements and Attributes. In particular, for ODF 1.2 it was not actually checked whether an ancestor is a <text:p>/<text:h> element (which is where it differs from ODF 1.1).
incubator/odf/trunk/validator/src/main/java/org/odftoolkit/odfvalidator/ForeignContentFilter.java