[MOV] ebay_connector: move 'ebay' and 'sale_ebay' references to 'ebay_connector'

The official name of the module is 'eBay Connector'. This commit thus makes use of this name in all places to avoid any confusion.

sales/ebay_connector/manage.rst

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+======================
+How to list a product?
+======================
+
+Listing without variation
+=========================
+
+In order to list a product, you need to check the **use eBay** field on a product
+form. The eBay tab will be available.
+
+.. image:: ./media/manage01.png
+  :align: center
+
+When the **Use Stock Quantity** field is checked, the quantity sets on eBay will
+be the Odoo **Forecast Quantity**.
+
+The **Description Template** allows you to use templates for your listings. The
+default template only use the **eBay Description** field of the product. You can
+use html inside the **Description Template** and in the **eBay Description**.
+
+To use pictures in your listing, you need to add them as **Attachments** on the product template.
+
+Listing with variations
+=======================
+
+When the **use eBay** on a product with variations is checked and with **Fixed
+Price** as **Listing Type**, the eBay form is sligthly different. In the
+variants array, you can choose which variant will be listed on eBay as well as
+set the price and the quantity for each variant.
+
+.. image:: ./media/manage02.png
+  :align: center
+
+Listing with item specifics
+===========================
+
+In order to add item specifics, you should create a product attribute with one
+value in the **Variants** tab on the product form.
+
+.. image:: ./media/manage03.png
+  :align: center
+
+Product Identifiers
+===================
+
+Products identifiers such as EAN, UPC, Brand or MPN are required in most of the eBay category.
+The module manages the EAN and UPC identifiers with the **Barcode** field of the product variant.
+If the **Barcode** field is empty or is value is not valid, the EAN and UPC values will be set as 'Does not apply' as recommended by eBay.
+The Brand and MPN values are working as item specifics and should be define in the **Variants** tab on the product form.
+If theses values are not set, 'Does not apply' will be used for the eBay listing.

sales/ebay_connector/setup.rst

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+==============================
+How to configure eBay in Odoo?
+==============================
+
+Create eBay tokens
+==================
+
+In order to create your tokens, you need to create a developer account on the
+`developer portal <https://go.developer.ebay.com/>`_.
+Once you are logged in, you can create **Sandbox Keys** and **Production Keys**
+by clicking on the adequate buttons.
+
+.. image:: ./media/setup01.png
+  :align: center
+
+After the creation of the keys, you can get the user token. To do so, click on
+the **Get a User Token** link in the bottom of the page. Go through the form,
+log in with you eBay account and you will get the keys and token needed to
+configure the module in Odoo.
+
+Set up tokens in Odoo?
+======================
+
+To set up the eBay integration, go to :menuselection:`Sales --> Configuration --> Settings`.
+
+.. image:: ./media/setup02.png
+  :align: center
+
+First choose if you want to use the production or the sandbox eBay Site. Then
+fill in the fields **Developer Key**, **Token**, **App Key**, **Cert Key**.
+Apply the changes.
+
+Once the page is reloaded, you need to synchronize information from eBay. Push
+on **Sync countries and currencies**, then you can fill in all the other fields.
+
+When all the fields are filled in, you can synchronize the categories and the
+policies by clicking on the adequate buttons.
+
+Using the updated synchronisation method
+========================================
+
+If you have a lot of products, the eBay API can sometimes refuse some synchronization
+calls due to a time-based limit on the number of requests that eBay enforces.
+
+To fix this issue, a new implementation mechanism has been developped; however this
+updated mechanism is disabled by default to avoid having the 2 systems running in
+parallel in existing installations.
+
+To switch to the new synchronization mechanism:
+
+#. Enable the Developper Mode by going to :menuselection:`Settings --> Activate the developer mode`
+#. Go to :menuselection:`Settings --> Technical --> Scheduled Actions`
+#. Archive the old synchronization actions (both are named *Ebay: update product status*)
+#. Activate the new synchronization actions (*Ebay: get new orders* which runs every 15min by default and *Ebay: synchronise stock (for 'get new orders' synchronisation)* which runs once a day per default)
+#. Ensure that the **Next Execution Date** for both these actions are in the near future
+
+Starting with the next execution date, the new method will be used instead of the old one.