[TACACS] Handle log rotate failed issue (sonic-net#12821)

Handle log rotate failed issue

#### Why I did it
sonic test_ro_disk test case failed because log rotate command failed.

#### How I did it
Ignore log rotate failed because log already rotating

#### How to verify it
Pass all test case.

#### Description for the changelog
Handle log rotate failed issue

tests/tacacs/test_ro_disk.py

@@ -179,7 +179,14 @@ def test_ro_disk(localhost, ptfhost, duthosts, enum_rand_one_per_hwsku_hostname,
         duthost.copy(src=conf_path, dest="/etc/rsyslog.d/000-ro_disk.conf")
 
         # To get file in decent size. Force a rotate
-        duthost.shell("logrotate --force /etc/logrotate.d/rsyslog")
+        try:
+            duthost.shell("logrotate --force /etc/logrotate.d/rsyslog")
+        except RunAnsibleModuleFail as e:
+            if "logrotate does not support parallel execution on the same set of logfiles" in e.message:
+                # command will failed when log already in rotating
+                logger.warning("logrotate command failed: {}".format(e))
+            else:
+                raise e
 
         res = duthost.shell("systemctl restart rsyslog")
         assert res["rc"] == 0, "failed to restart rsyslog"