SOS-2489 - Javascript becomes inoperative when SO Announcements portlet ...

this issue is caused by "SOS-1772",and "SOS-1772" only affect "ee-6.1.2.ga2",so it should not be applied to ee-6.1.x、6.2.x and trunk.

change
   var announcementEntries = A.one('#p_p_id<portlet:namespace /> .portlet-content-container');
to
  var announcementEntries = A.one('#p_p_id<portlet:namespace />');