Concurrency bug in Test Evolution Gadget.

[c.x.r.r.t.service.impl.DefaultTestChartDataProvider] Error occurred when generating data bean for the tests evolution chart. java.lang.ArrayIndexOutOfBoundsException: 18 at sun.util.calendar.BaseCalendar.getCalendarDateFromFixedDate(BaseCalendar.java:453) at java.util.GregorianCalendar.computeFields(GregorianCalendar.java:2397) at java.util.GregorianCalendar.computeFields(GregorianCalendar.java:2312) at java.util.Calendar.setTimeInMillis(Calendar.java:1804) at java.util.Calendar.setTime(Calendar.java:1770) at java.text.SimpleDateFormat.format(SimpleDateFormat.java:943) at java.text.SimpleDateFormat.format(SimpleDateFormat.java:936) at java.text.DateFormat.format(DateFormat.java:345) at com.xpandit.raven.dao.a.a(Unknown Source) at com.xpandit.raven.dao.impl.DAOContextImpl.a(Unknown Source) at com.xpandit.raven.dao.impl.TestsEvolutionDAOImpl.a(Unknown Source) at com.xpandit.raven.dao.impl.TestsEvolutionDAOImpl.a(Unknown Source) at com.xpandit.raven.repository.TestRunRepositoryImpl.a(Unknown Source)