Fixed the Right cell text in the Import/Export Accordion in Reports

Clicking on the Upload button causes the form to refresh (another case
of a non-AJAX Upload button) and display the "Custom Reports" caption
twice. This was fixed by setting the correct value in @right_cell_text

https://bugzilla.redhat.com/show_bug.cgi?id=1163661
Merge pull request #1073 from AparnaKarve/bz1163661_fix_right_cell_text

Fixed the Right cell text in the Import/Export Accordion in Reports