[MIG] Make modules uninstallable

report_custom_filename/__openerp__.py

@@ -36,7 +36,7 @@
     "test": [
     ],
     "auto_install": False,
-    "installable": True,
+    'installable': False,
     "application": False,
     "external_dependencies": {
         'python': ['jinja2'],

report_xls/__openerp__.py

@@ -77,6 +77,6 @@ Excel reports in odoo.
     'depends': ['base'],
     'external_dependencies': {'python': ['xlwt']},
     'active': False,
-    'installable': True,
+    'installable': False,
 }
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