public static void appendNonNull(StringBuilder builder, Object value) {
    appendNonNull(builder, value, false);
  }
Creates a String from the properties in this format:
   'property_name1'='property_value1',
   'property_name2'='property_value2',
   ...

Properties are listed in alphabetical order.

@param properties The properties to list.
@param exclude Property names to exclude.
ql/src/java/org/apache/hadoop/hive/ql/ddl/ShowUtils.java