lava_wait_jobs: Retry also on YAMLError

yaml.parser.ParserError

Recently, we had a few builds which failed pretty early with YAML
ParserError/ScannerError whiel fetching (initial) artifacts:

https://ci.trustedfirmware.org/job/tf-m-code-coverage/78/console
https://ci.trustedfirmware.org/job/tf-m-code-coverage/76/console

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I2774369c4e26707fc969c7978899036e9ceb8d86
diff --git a/lava_helper/lava_wait_jobs.py b/lava_helper/lava_wait_jobs.py
index 7a5ee43..305f4b7 100755
--- a/lava_helper/lava_wait_jobs.py
+++ b/lava_helper/lava_wait_jobs.py
@@ -112,7 +112,7 @@
                 time.sleep(0.2)
                 lava.get_job_results(job_id, results_file)
                 break
-            except (ProtocolError, IOError) as e:
+            except (ProtocolError, IOError, yaml.error.YAMLError) as e:
                 if retry == 1:
                     raise
                 else: