-- fix for CRM-12310

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* CRM-12310: Missing First Name, Last Name sporadically in Membership Detail Report
  http://issues.civicrm.org/jira/browse/CRM-12310

The First Name and Last Name were missing because these columns had "no_repeat" parameter set for them. So, its like if the column already has a row value say "abc", then this won't be repeated again in any other rows. In the screenshot attached in issue CRM-12310, the first name "Sandy" and last name "Jones" already appeared once in the previous rows, so it isn't visible in other rows. This seems like a regression, so I have removed "no_repeat" from first name and last name columns.