CRAYSAT-1706: To stop waiting if BOS session is deleted

IM:CRAYSAT-1706
Reviewer:Ryan

sat/cli/bootsys/bos.py

@@ -45,7 +45,7 @@
 from sat.config import get_config_value
 from sat.session import SATSession
 from sat.util import pester, prompt_continue
-from sat.waiting import Waiter
+from sat.waiting import Waiter, WaitingFailure
 from sat.xname import XName
 
 LOGGER = logging.getLogger(__name__)
@@ -277,7 +277,7 @@ def has_completed(self):
             return False
 
         except APIError as err:
-            LOGGER.warning('Failed to query session status: %s', err)
+            raise WaitingFailure('Failed to query session status: %s', err)
         except KeyError as err:
             LOGGER.warning('BOS session status query response missing key %s', err)