DAOS-16000 test: fix get_host_log_files ignoring error (#14540)

Test-tag: pr,vm
Skip-unit-tests: true
Skip-fault-injection-test: true

Redirect stderr to stdout so "grep -v <error>" works as expected.

Required-githooks: true

Signed-off-by: Dalton Bohning <dalton.bohning@intel.com>

src/tests/ftest/util/server_utils.py

@@ -1218,7 +1218,7 @@ def get_host_log_files(self):
                     file_search.append(".".join([log_file, pid]))
             # Determine which of those log files actually do exist on this host
             # This matches the engine pid to the engine log file name
-            command = f"ls -1 {' '.join(file_search)} | grep -v 'No such file or directory'"
+            command = f"ls -1 {' '.join(file_search)} 2>&1 | grep -v 'No such file or directory'"
             result = run_remote(self.log, host, command, False)
             for data in result.output:
                 for line in data.stdout: