Add dfareporting_v2_6, regenerate APIs

generated/google/apis/admin_reports_v1/service.rb

@@ -22,8 +22,8 @@ module Google
     module AdminReportsV1
       # Admin Reports API
       #
-      # Allows the administrators of Google Apps customers to fetch reports about the
-      #  usage, collaboration, security and risk for their users.
+      # Fetches reports for the administrators of Google Apps customers about the
+      #  usage, collaboration, security, and risk for their users.
       #
       # @example
       #    require 'google/apis/admin_reports_v1'