enable the export validation for chart ODS tests

Don't even think about using the new skip flag for your shiny new test.
If you itnroduce tests that show validation errors fix them!!

Change-Id: I21bf61a113a35ca204a54d18246848a5788ae559

chart2/qa/extras/chart2export.cxx

@@ -421,6 +421,7 @@ void Chart2ExportTest::testErrorBarXLSX()
 // in an export -> import cycle using different file formats - ODS, XLS and XLSX.
 void Chart2ExportTest::testTrendline()
 {
+    mbSkipValidation = true;
     load("/chart2/qa/extras/data/ods/", "trendline.ods");
     checkTrendlinesInChart(getChartDocFromSheet( 0, mxComponent));
     reload("calc8");

chart2/qa/extras/charttest.hxx

@@ -52,6 +52,7 @@ using namespace com::sun::star::uno;
 class ChartTest : public test::BootstrapFixture, public unotest::MacrosTest
 {
 public:
+    ChartTest():mbSkipValidation(false) {}
     void load( const OUString& rDir, const OUString& rFileName );
     boost::shared_ptr<utl::TempFile> reload( const OUString& rFileName );
     uno::Sequence < OUString > getImpressChartColumnDescriptions( const char* pDir, const char* pName );
@@ -65,6 +66,7 @@ public:
 protected:
     Reference< lang::XComponent > mxComponent;
     OUString maServiceName;
+    bool mbSkipValidation; // if you set this flag for a new test I'm going to haunt you!
 };
 
 OUString ChartTest::getFileExtension( const OUString& aFileName )
@@ -112,7 +114,8 @@ boost::shared_ptr<utl::TempFile> ChartTest::reload(const OUString& rFilterName)
     }
     else if(rFilterName == "calc8")
     {
-        validate(pTempFile->GetFileName(), test::ODF);
+        if(!mbSkipValidation)
+            validate(pTempFile->GetFileName(), test::ODF);
     }
 
     CPPUNIT_ASSERT(mxComponent.is());