Human UI Plugin: increase level priority interrupted message

When a job gets interrupted, users want to notice it.  So far, it's
been presented in the Human UI as a simple "INFO" message, that may
"fade into the background" with the other messages.

By bumping it a level to a warning, it should be easier for users to
notice it.

This is not made into a error, because the caused for the interruption
may be an expected situation, such as a job timeout.

Signed-off-by: Cleber Rosa <[email protected]>

avocado/plugins/human.py

@@ -140,7 +140,7 @@ def post_tests(self, job):
             return
 
         if job.interrupted_reason is not None:
-            LOG_UI.info(job.interrupted_reason)
+            LOG_UI.warning(job.interrupted_reason)
 
         if job.status == "PASS":
             LOG_UI.info(