[FIX] l10n_{us,ca}: use "US Letter" as default paper size

addons/l10n_ca/__openerp__.py

@@ -39,6 +39,7 @@ position.
         'base_iban',
         'base_vat',
         'l10n_multilang',
+        'report',
     ],
     'data': [
         'account_chart_template.xml',
@@ -47,6 +48,7 @@ position.
         'account_tax.xml',
         'fiscal_templates.xml',
         'account_chart_template.yml',
+        'data/res_company.xml',
     ],
     'installable': True,
     'post_init_hook': 'load_translations',

addons/l10n_ca/data/res_company.xml

+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+<record model="res.company" id="base.main_company">
+    <field name="rml_paper_format">us_letter</field>
+    <field name="paperformat_id" ref="report.paperformat_us"/>
+</record>
+
+</odoo>

addons/l10n_us/__openerp__.py

@@ -8,8 +8,9 @@
 United States - Chart of accounts.
 ==================================
     """,
-    'depends': ['l10n_generic_coa'],
+    'depends': ['l10n_generic_coa', 'report'],
     'data': [
+        'data/res_company.xml',
     ],
     'demo': [],
     'test': [],

addons/l10n_us/data/res_company.xml

+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+<record model="res.company" id="base.main_company">
+    <field name="rml_paper_format">us_letter</field>
+    <field name="paperformat_id" ref="report.paperformat_us"/>
+</record>
+
+</odoo>