stock-rma/rma/security/rma.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data noupdate="0">

        <record model="ir.module.category" id="module_category_rma">
            <field name="name">RMA</field>
            <field name="parent_id" ref="base.module_category_sales_management"/>
            <field name="sequence">30</field>
        </record>

        <record id="group_rma_customer_user" model="res.groups">
            <field name="name">RMA Customer User</field>
            <field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>
            <field name="category_id" ref="module_category_rma"/>
        </record>

        <record id="group_rma_supplier_user" model="res.groups">
            <field name="name">RMA Supplier User</field>
            <field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>
            <field name="category_id" ref="module_category_rma"/>
        </record>

        <record id="group_rma_manager" model="res.groups">
            <field name="name">RMA Manager</field>
            <field name="implied_ids"
                   eval="[(4, ref('rma.group_rma_customer_user')), (4, ref('rma.group_rma_supplier_user'))]"/>
            <field name="users" eval="[(4, ref('base.user_root'))]"/>
            <field name="category_id" ref="module_category_rma"/>
        </record>

        <record id="group_rma_delivery_invoice_address" model="res.groups">
            <field name="name">Addresses in RMA</field>
            <field name="category_id" ref="module_category_rma"/>
            <field name="users" eval="[(4, ref('base.user_root'))]"/>
        </record>

    </data>
</odoo>