update documentation of services and schedules modules

docs/source/module/schedules/clean_old_tasks.rst

+``gso.schedules.clean_old_tasks``
+=================================
+
+.. automodule:: gso.schedules.clean_old_tasks
+   :members:
+   :show-inheritance:

docs/source/module/schedules/index.rst

@@ -14,7 +14,9 @@ Submodules
 .. toctree::
    :maxdepth: 1
 
+   clean_old_tasks
    scheduling
+   send_email_notifications
    task_vacuum
    validate_products
    validate_subscriptions

docs/source/module/schedules/send_email_notifications.rst

+``gso.schedules.send_email_notifications``
+==========================================
+
+.. automodule:: gso.schedules.send_email_notifications
+   :members:
+   :show-inheritance:

docs/source/module/services/index.rst

@@ -13,9 +13,12 @@ Submodules
    :titlesonly:
 
    infoblox
+   kentik_client
    librenms_client
    lso_client
    mailer
    netbox_client
    partners
+   processes
+   sharepoint
    subscriptions

docs/source/module/services/kentik_client.rst

+``gso.services.kentik_client``
+==============================
+
+.. automodule:: gso.services.kentik_client
+   :members:
+   :show-inheritance:

docs/source/module/services/processes.rst

+``gso.services.processes``
+==========================
+
+.. automodule:: gso.services.processes
+   :members:
+   :show-inheritance:

docs/source/module/services/sharepoint.rst

+``gso.services.sharepoint``
+===========================
+
+.. automodule:: gso.services.sharepoint
+   :members:
+   :show-inheritance: