Bug 28786: (QA follow-up) Fix qa warnings

Bug 28786: (QA follow-up) Fix qa warnings

 FAIL   members/two_factor_auth.pl
   FAIL   file permissions
                File must have the exec flag
 FAIL   koha-tmpl/intranet-tmpl/prog/en/modules/members/two_factor_auth.tt
   FAIL   filters
                missing_filter at line 42 (                        <p>Account: [% issuer %]</p>)
                missing_filter at line 43 (                        <p>Key: [% key_id %]</p>)
                missing_filter at line 54 (                            <input type="hidden" name="secret32" value="[% secret32 %]" />)
                missing_filter at line 58 (                                    <img id="qr_code" src="[% qr_code_url %]" />)
 FAIL   Koha/Auth/TwoFactorAuth.pm
   FAIL   pod coverage
                POD is missing for 'new'

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>