DAOS-16265 test: Fix erasurecode/rebuild_fio.py out of space

The erasurecode/rebuild_fio.py test runs out of space in self.test_dir
due to the same path being used for the control metadata path in MD on
SSD mode.  The test log file is also quite large with 24 test variants.

Skip-unit-tests: true
Skip-fault-injection-test: true
Test-tag: EcodFioRebuild
Skip-func-hw-test-large-md-on-ssd: false

Required-githooks: true

Signed-off-by: Phil Henderson <[email protected]>

src/tests/ftest/util/apricot/apricot/test.py

@@ -769,9 +769,13 @@ def setUp(self):
         self.log.debug("Common test directory (%s) contents:", os.path.dirname(self.test_dir))
         all_hosts = include_local_host(self.host_info.all_hosts)
         test_dir_parent = os.path.dirname(self.test_dir)
-        result = run_remote(self.log, all_hosts, f"df -h {test_dir_parent}")
-        if int(max(re.findall(r" ([\d+])% ", result.joined_stdout) + ["0"])) > 90:
-            run_remote(self.log, all_hosts, f"du -sh {test_dir_parent}/*")
+        _result = run_remote(self.log, all_hosts, f"df -h {test_dir_parent}")
+        _details = NodeSet()
+        for _host, _stdout in _result.all_stdout.items():
+            if int(max(re.findall(r"\s+([\d]+)%\s+", _stdout) + ["0"])) > 90:
+                _details.add(_host)
+        if _details:
+            run_remote(self.log, _details, f"du -sh {test_dir_parent}/*")
         self.log.info("-" * 100)
 
         if not self.start_servers_once or self.name.uid == 1: