bitbake: toaster/tests/functional/utils: Handle WebDriverException

Fix the exception handling in the cancel builds function.

This involved adding WebDriverException which sometimes occurs but
also correcting the other exception handlers to continue to increment
the timeout to avoid test hangs.

(Bitbake rev: e111a2bd4f7a8a4dc2c63e94e91ac6cacca95af8)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/tests/functional/utils.py

@@ -8,7 +8,7 @@
 
 
 from time import sleep
-from selenium.common.exceptions import NoSuchElementException, StaleElementReferenceException, TimeoutException
+from selenium.common.exceptions import NoSuchElementException, StaleElementReferenceException, TimeoutException, WebDriverException
 from selenium.webdriver.common.by import By
 
 from orm.models import Build
@@ -66,12 +66,14 @@ def wait_until_build_cancelled(test_instance):
                 pass
             if 'cancelled' in str(build_state).lower():
                 break
-        except NoSuchElementException:
-            continue
-        except StaleElementReferenceException:
-            continue
         except TimeoutException:
             break
+        except NoSuchElementException:
+            pass
+        except StaleElementReferenceException:
+            pass
+        except WebDriverException:
+            pass
         start_time += 1
         sleep(1) # take a breath and try again