<?xml version="1.0"?>
<openerp>
    <data>
    
    <!-- Account Move -->
    <record id="view_account_move_reversal_form" model="ir.ui.view">
        <field name="name">account.move.form.reversal</field>
        <field name="model">account.move</field>
        <field name="inherit_id" ref="account_streamline.view_move_form_streamline"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='button_cancel']" position="after">
                <button name="button_reverse_move" states="posted" string="Reverse Entry" type="object" groups="account.group_account_user" />
            </xpath>
        </field>
    </record>

    </data>
</openerp>

<?xml version="1.0"?>
<openerp>
    <data>
    
    <!-- Account Move -->
    <record id="view_account_move_reversal_form" model="ir.ui.view">
        <field name="name">account.move.form.reversal</field>
        <field name="model">account.move</field>
        <field name="inherit_id" ref="account_streamline.view_move_form_streamline"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='button_cancel']" position="after">
                <button name="button_reverse_move" states="posted" string="Reverse Entry" type="object" groups="account.group_account_user" />
            </xpath>
            <xpath expr="//button[@name='button_cancel']" position="attributes">
                <attribute name="groups">base.group_no_one</attribute>
            </xpath>
        </field>
    </record>

    </data>
</openerp>

Remove the button "cancel entry" for all non admin
Remove the button "cancel entry" for all non admin
