:param wim: (dict). Contains among others 'wim_url'
:param wim_account: (dict). Contains among others 'uuid' (internal id), 'name',
'sdn' (True if is intended for SDN-assist or False if intended for WIM), 'user', 'password'.
:param config: (dict or None): Particular information of plugin. These keys if present have a common meaning:
'mapping_not_needed': (bool) False by default or if missing, indicates that mapping is not needed.
'service_endpoint_mapping': (list) provides the internal endpoint mapping. The meaning is:
:param wim: (dict). Contains among others 'wim_url'
:param wim_account: (dict). Contains among others 'uuid' (internal id), 'name',
'sdn' (True if is intended for SDN-assist or False if intended for WIM), 'user', 'password'.
:param config: (dict or None): Particular information of plugin. These keys if present have a common meaning:
'mapping_not_needed': (bool) False by default or if missing, indicates that mapping is not needed.
'service_endpoint_mapping': (list) provides the internal endpoint mapping. The meaning is: