distinc date format on parameter lastModified in LukeRequestHandler

[Miguel Valencia Zurera]

hi everybody

I have two instalation of apache solr 3.5.0 and when I consult web page 
"/admin/luke" I see that parameter lastmodified have distinct format in 
both.
The first show: <date name="lastModified">2016-05-20T13:03:03Z</date>
and the second show: <date 
name="lastModified">2016-05-20T13:03:03.593Z</date>

why the second solr show miliseconds in lastmodified parameter?, Is 
possible configure the format of this parameter?

Thanks