DOCX strict import: fix headers

Now that the document has a header, better to just test the bottom
margin, as in case there is a header, the top margin has different
semantics in Word and Writer.

Change-Id: I11212965ecd364cdc8a205c3ab3b8b71ed12944b

sw/qa/extras/ooxmlimport/ooxmlimport.cxx

@@ -1908,11 +1908,15 @@ DECLARE_OOXMLIMPORT_TEST(testStrict, "strict.docx")
 {
     uno::Reference<beans::XPropertySet> xPageStyle(getStyles("PageStyles")->getByName(DEFAULT_STYLE), uno::UNO_QUERY);
     // This was only 127, pt suffix was ignored, so this got parsed as twips instead of points.
-    CPPUNIT_ASSERT_EQUAL(sal_Int32(TWIP_TO_MM100(72 * 20)), getProperty<sal_Int32>(xPageStyle, "TopMargin"));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(TWIP_TO_MM100(72 * 20)), getProperty<sal_Int32>(xPageStyle, "BottomMargin"));
     // This was only 1397, same issue
     CPPUNIT_ASSERT_EQUAL(sal_Int32(TWIP_TO_MM100(792 * 20)), getProperty<sal_Int32>(xPageStyle, "Height"));
     // Text was missing, due to not handling the strict namespaces.
     getParagraph(1, "Hello world!");
+
+    // Header in the document caused a crash on import.
+    uno::Reference<text::XText> xHeaderText(xPageStyle->getPropertyValue("HeaderText"), uno::UNO_QUERY);
+    getParagraphOfText(1, xHeaderText, "This is a header.");
 }
 
 #endif

writerfilter/source/ooxml/model.xml

@@ -19,6 +19,7 @@
 <model xmlns:rng="http://relaxng.org/ns/structure/1.0">
   <namespace-alias name="http://www.w3.org/XML/1998/namespace" alias="xml" id="xml"/>
   <namespace-alias name="http://schemas.openxmlformats.org/officeDocument/2006/relationships" alias="relationships" id="officeRel"/>
+  <namespace-alias name="http://purl.oclc.org/ooxml/officeDocument/relationships" alias="relationships" id="officeRel"/>
   <namespace-alias name="urn:schemas-microsoft-com:office:office" alias="office" id="vmlOffice"/>
   <namespace-alias name="http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme" alias="theme" id="officeRelTheme"/>
   <namespace-alias name="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" alias="wordprocessingDrawing" id="dmlWordDr"/>