tdf#114845: unit test to prevent a bad fix

The fix I was about to suggest broke this file on round-trip.
It is not enough to just exclude if not a group-shape, or
else the group-shape detection is not good enough.

Change-Id: I0048bb9221262afdd373b18b5d73ec9468b7d670
Reviewed-on: https://gerrit.libreoffice.org/56340
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>

sd/qa/unit/export-tests-ooxml2.cxx

@@ -1292,7 +1292,10 @@ void SdOOXMLExportTest2::testSmartartRotation2()
     xDocShRef->DoClose();
 
     xmlDocPtr pXmlDocContent = parseExport(tempFile, "ppt/slides/slide1.xml");
+    assertXPath(pXmlDocContent, "/p:sld/p:cSld/p:spTree/p:grpSp/p:sp[3]/p:txBody/a:p/a:r/a:t", "Text");
     assertXPath(pXmlDocContent, "/p:sld/p:cSld/p:spTree/p:grpSp/p:sp[3]/p:txBody/a:bodyPr", "rot", "10800000");
+    assertXPath(pXmlDocContent, "/p:sld/p:cSld/p:spTree/p:grpSp/p:sp[3]/p:spPr/a:xfrm/a:off", "x", "2276280");
+    assertXPath(pXmlDocContent, "/p:sld/p:cSld/p:spTree/p:grpSp/p:sp[3]/p:spPr/a:xfrm/a:off", "y", "3158280");
 }
 
 void SdOOXMLExportTest2::testGroupsPosition()