[FIX] removed static folders, added preloadable key in manifest in all models

mail_environment/__manifest__.py

@@ -9,6 +9,7 @@
     'author': "Camptocamp, Odoo Community Association (OCA)",
     'license': 'AGPL-3',
     'website': 'https://github.com/OCA/server-env',
+    'preloadable': False,
     'depends': [
         'fetchmail',
         'server_environment',

server_environment/__manifest__.py

@@ -30,6 +30,7 @@
     "website": "http://odoo-community.org/",
     "license": "GPL-3 or any later version",
     "category": "Tools",
+    "preloadable": False,
     "data": [
         'serv_config.xml',
     ],

server_environment_files_sample/__manifest__.py

@@ -27,5 +27,6 @@
     "website": "http://www.camptocamp.com",
     "license": "GPL-3 or any later version",
     "category": "Tools",
+    "preloadable": False,
     "data": [],
 }

server_environment_ir_config_parameter/__manifest__.py

@@ -9,6 +9,7 @@
     'license': 'AGPL-3',
     'author': 'ACSONE SA/NV, Odoo Community Association (OCA)',
     'website': 'https://github.com/OCA/server-env/',
+    'preloadable': False,
     'depends': [
         'server_environment',
     ],