eiru_inmobiliaria/views/account_analytic_account.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <record model="ir.ui.view" id="contrato_form_view">
       <field name="name">contrato_form_view</field>
       <field name="model">account.analytic.account</field>
       <field name="inherit_id" ref="account_analytic_analysis.account_analytic_account_form_form"/>
       <field name="arch" type="xml">
          <field name="recurring_next_date" position="before">
            <field name="cuota_total"/>
            <field name="nro_cuotas" readonly="1"/>
          </field>
      </field>
    </record>

    <record id="contrato_form_view_editable" model="ir.ui.view">
        <field name="name">contrato_form_view_editable</field>
        <field name="model">account.analytic.account</field>
        <field name="inherit_id" ref="account_analytic_analysis.account_analytic_account_form_form"/>
        <field name="groups_id" eval="[(6, 0, [ref('eiru_inmobiliaria.readonly_fields_inmobiliaria')])]"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='nro_cuotas']" position="attributes">
                <attribute name="readonly">0</attribute>
            </xpath>
        </field>
    </record>

    <record model="ir.ui.view" id="contrato_form_view2">
       <field name="name">contrato_form_view2</field>
       <field name="model">account.analytic.account</field>
       <field name="inherit_id" ref="analytic.view_account_analytic_account_form"/>
       <field name="arch" type="xml">
         <field name="code" position="replace">
            <field name="code" readonly="1"/>
          </field>
      </field>
    </record>
</data>
</openerp>