Add unit test for tdf#117819

Change-Id: Ice57b81106d35f5b217f0680824d1acf62ff9098
diff --git a/svl/qa/unit/svl.cxx b/svl/qa/unit/svl.cxx
index 6e90143..679340a 100644
--- a/svl/qa/unit/svl.cxx
+++ b/svl/qa/unit/svl.cxx
@@ -1502,6 +1502,12 @@ void Test::testUserDefinedNumberFormats()
        sCode =     "\"Finnish: \"YYYY/MM/DD HH:MM:SS";
        checkPreviewString(aFormatter, sCode, M_PI, eLang, sExpected);
    }
    {   // tdf#117819 wrong separator positions when displaying integers with
        // more decimals than rtl::math::doubleToUString delivers.
        sCode = "#,##0.00000000000000000000";
        sExpected = "117,669,030,460,994.00000000000000000000";
        checkPreviewString(aFormatter, sCode, 117669030460994.0, LANGUAGE_ENGLISH_US, sExpected);
    }
}

void Test::testNfEnglishKeywordsIntegrity()