[FIX] Regression fixed by a commit 4240 which made employee_id field mandatory

bzr revid: jvo@tinyerp.com-20101006185316-d1u5tjc2ng01hb0t

addons/hr_timesheet_sheet/hr_timesheet_sheet_demo.xml

@@ -4,6 +4,7 @@
         <record id="sheet0" model="hr_timesheet_sheet.sheet">
             <field name="name">Sheet 0</field>
             <field name="user_id" ref="base.user_root"/>
+            <field name="employee_id" ref="hr.employee1" />
             <field eval="time.strftime('%Y-%m-01', time.localtime(time.mktime(time.localtime()[0:2] + (0,)*7)-1))" name="date_from"/>
             <field eval="time.strftime('%Y-%m-15', time.localtime(time.mktime(time.localtime()[0:2] + (0,)*7)-1))" name="date_current"/>
             <field eval="time.strftime('%Y-%m-%d', time.localtime(time.mktime(time.localtime()[0:2] + (0,)*7)-1))" name="date_to"/>

addons/hr_timesheet_sheet/test/test_hr_timesheet_sheet.yml

@@ -70,6 +70,7 @@
     name: Week-22(2010)
     state: new
     user_id: base.user_root
+    employee_id: 'hr_employee_employee0'
 -
   Now , at the time of login, I create Attendances and perform "Sign In" action.
 -