Date conversion does not handle timzone offset correctly for date strings containing seconds

The date format containing seconds and timezone offset as follows generates an exception:

yyyy-MM-dd'T'hh:mm:ssZ

e.g.:

2013-03-04T15:07:14+11:00

The web service call fails with the exception:

Caused by: java.lang.IllegalArgumentException: ZONE_OFFSET
at java.util.GregorianCalendar.computeTime(GregorianCalendar.java:2316)
at java.util.Calendar.updateTime(Calendar.java:2469)
at java.util.Calendar.getTimeInMillis(Calendar.java:1088)
at org.apache.axis2.databinding.utils.ConverterUtil.convertToDate(ConverterUtil.java:623)

ConvertUtil.java line 596:

int hours = Integer.parseInt(restpart.substring(1,3));
int minits = Integer.parseInt(restpart.substring(4,6));
timeZoneOffSet = ((hours * 60) + minits) * 60000;