LAVA scripts: Don't assume job id is int

This no longer will be true with TuxSuite integration, so just treat id as
a string.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I37e3d0bfede394804dcc26fc71734cdf6ad16f58
diff --git a/lava_helper/lava_wait_jobs.py b/lava_helper/lava_wait_jobs.py
index ec1191a..6791c25 100755
--- a/lava_helper/lava_wait_jobs.py
+++ b/lava_helper/lava_wait_jobs.py
@@ -75,7 +75,7 @@
     for job_id, info in jobs.items():
         if not (info['health'] == "Complete" and info['state'] == "Finished"):
             _log.warning(
-                "Will resubmit job %d because of its state: %s, health: %s",
+                "Will resubmit job %s because of its state: %s, health: %s",
                 job_id, info["state"], info["health"]
             )
             job_dir = info['job_dir']