Fix bug with Numeric column

Author: shulkaolka

src/main/java/io/elastic/jdbc/Utils.java

@@ -262,7 +262,7 @@ public static JsonObjectBuilder getColumnDataByType(ResultSet rs, ResultSetMetaD
           break;
         case Types.NUMERIC:
         case Types.DECIMAL:
-          row.add(columnName, (rs.getBigDecimal(columnName) != null));
+          row.add(columnName, rs.getBigDecimal(columnName));
           break;
         case Types.DOUBLE:
           row.add(columnName, rs.getDouble(columnName));