partner.xml

<record model="ir.actions.act_window" id="contact_list_action">
    <field name="name">Contacts</field>
    <field name="res_model">res.partner</field>
    <field name="view_type">form</field>
    <field name="view_mode">tree,form</field>
    <field name="help" type="html">
        <p class="oe_view_nocontent_create">just a record</p>
    </field>
</record>

<record model="ir.actions.act_window" id="contact_cat_list_action">
    <field name="name">Contact Tag</field>
    <field name="res_model">res.partner.category</field>
    <field name="view_mode">tree,form</field>
</record>

<menuitem id="configuration_menu" name="Configuration"
          parent="main_openacademy_menu"/>
<menuitem id ='contact_menu' name="Contacts"
          parent="configuration_menu"/>
<menuitem id="contact_cat_menu" name="Contact Tags"
          parent="configuration_menu">
</menuitem>


openacademy.xml

<menuitem id="main_openacademy_menu" name="o_a"/>
<menuitem id="openacademy_menu" name="iamstanislav"
          parent="main_openacademy_menu"/>
<menuitem id="courses_menu" name="Courses" parent="openacademy_menu"
          action="course_list_action"/>