[FIX] hr_expense: better implied access group

To confirm expense, you have to be expense manager,
which implied HR officer. This implied relation is
not required anymore.
For the HR apps to be independent, removing this
relation is better and does not impact normal
expense flow (submit - confirm - post).

addons/hr_expense/security/hr_expense_security.xml

@@ -3,7 +3,7 @@
     <record id="group_hr_expense_user" model="res.groups">
         <field name="name">Officer</field>
         <field name="category_id" ref="base.module_category_hr_expense"/>
-        <field name="implied_ids" eval="[(4, ref('hr.group_hr_user'))]"/>
+        <field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>
     </record>
 
     <record id="group_hr_expense_manager" model="res.groups">