Change col and row names because MySQL 8.0.2

a.valllloverarequested to merge
a.vallllovera/reportplus:2.6.x-dev-fix_bug_update_mysql_8.0.2 into 2.6.x
  • /CRM/Reportplus/Form/Matrix.php
  • /CRM/Reportplus/Form/Activity/Matrix.php
  • /info.xml

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