[FIX] hr_expense: display analytic account on report

Order of attributes matter in QWeb and due to unexpected evaluation order
<span t-field t-fi /> will not works while <span t-if t-field /> do.
Since v8, the ORM will no longer crash to resolve foo.bar.name if bar is not
defined. The t-if clause is then not necessary and can be simply remove instead
of inverting the order of clauses.

addons/hr_expense/views/report_expense.xml

@@ -44,7 +44,7 @@
                                 <td>
                                     <span t-field="line.name"/> 
                                     <span t-field="line.description"/><br/>
-                                    <span t-field="line.analytic_account.complete_name" t-if="line.analytic_account"/>
+                                    <span t-field="line.analytic_account.complete_name"/>
                                 </td>
                                 <td style="text-center">
                                     <span t-field="line.ref"/>