erp5_certificate_authority: Ensure user can call the action before get/revoke the certificates

bt5/erp5_certificate_authority/SkinTemplateItem/portal_skins/erp5_certificate_authority/CertificateLogin_getCertificate.py

+parent = context.getParentValue()
+
+if parent.getPortalType() == "Person":
+  parent.checkCertificateRequest()
+
 certificate = context.getCertificate()
 request = context.REQUEST
 request.set('your_certificate', certificate['certificate'])

bt5/erp5_certificate_authority/SkinTemplateItem/portal_skins/erp5_certificate_authority/CertificateLogin_revokeCertificate.py

+parent = context.getParentValue()
+
+if parent.getPortalType() == "Person":
+  parent.checkCertificateRequest()
+
 context.revokeCertificate()
 return context.Base_redirect(form_id, keep_items = {'portal_status_message' : 'Certificate revoked.'},  **kw)