Fixed for spacing between lines having lineRule "auto" is getting preserved

Problem Desciption:
In "w:spacing" value of "w:lineRule" attribute value is not getting is preserved.

Conflicts:
	sw/qa/extras/ooxmlexport/ooxmlexport.cxx
Reviewed on:
	https://gerrit.libreoffice.org/6675

Change-Id: Ie9c99864bd5a198af94c1d251666bcb3427d955a

sw/qa/extras/ooxmlexport/ooxmlexport.cxx

@@ -1888,6 +1888,12 @@ DECLARE_OOXML_TEST(testFootnoteParagraphTag, "testFootnote.docx")
     assertXPath(pXmlFootnotes, "/w:footnotes/w:footnote[3]/w:p/w:r/w:rPr/w:rStyle","val","Footnotereference");
 }
 
+DECLARE_OOXML_TEST(testSpacingLineRule,"table_lineRule.docx")
+{
+     xmlDocPtr pXmlDoc = parseExport("word/document.xml");
+     assertXPath(pXmlDoc, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:p/w:pPr/w:spacing", "lineRule", "auto");
+}
+
 #endif
 
 CPPUNIT_PLUGIN_IMPLEMENT();

sw/source/filter/ww8/ww8atr.cxx

@@ -4529,6 +4529,9 @@ void AttributeOutputBase::ParaLineSpacing( const SvxLineSpacingItem& rSpacing )
         default:
             break;
         case SVX_LINE_SPACE_AUTO:
+            nSpace = (short)( ( nSpace * rSpacing.GetPropLineSpace() ) / 100L );
+            nMulti = 1;
+            break;
         case SVX_LINE_SPACE_FIX:
         case SVX_LINE_SPACE_MIN:
         {