FIX: ZUGFeRDImporter.java -> Deleted output of Stacktrace if tryBigDecimal fails, as Exceptions are catched

libraryBasic/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDImporter.java

@@ -729,11 +729,9 @@ public class ZUGFeRDImporter {
 		try {
 			return new BigDecimal(nodeValue);
 		} catch (Exception e) {
-			e.printStackTrace();
 			try {
 				return new BigDecimal(Float.valueOf(nodeValue));
 			} catch (Exception ex) {
-				ex.printStackTrace();
 				return new BigDecimal("0.00");
 			}
 		}

libraryBasic/src/test/java/org/mustangproject/ZUGFeRD/ZF2Test.java

@@ -235,7 +235,6 @@ public class ZF2Test extends MustangReaderTestCase {
 		assertEquals(zi.getLineItemList().get(0).product.getName(), "Künstlerische Gestaltung (Stunde): Einer Beispielrechnung");
 		assertEquals(zi.getLineItemList().get(0).product.getDescription(), "");
 
-		int i = 1;
 		try {
 			assertEquals(zi.getVersion(), 2);
 		} catch (Exception e) {