Update documentation for modules, add deprecation warning for role, send and receive modules

Update variables in tower_inventory to be in dict format

awx_collection/plugins/modules/tower_send.py

@@ -106,6 +106,8 @@ def main():
 
     module = TowerModule(argument_spec=argument_spec, supports_check_mode=False)
 
+    module.deprecate(msg="This module is being moved to a different collection. Instead of awx.awx it will be migrated into awx.tower_cli", version="3.7")
+
     if not HAS_TOWER_CLI:
         module.fail_json(msg='ansible-tower-cli required for this module')