[#5246] Platform: Update cluster_health script to screen out non-loca…

…l volumes

Summary:
  - Added key `-l` to the `df` command.

Test Plan:
Test scenario:

1. Create a universe;
2. Create an NFS mount point on one of nodes (see instructions in https://phabricator.dev.yugabyte.com/D10787);
3. Wait for the `health-check` is completed;
4. Check that "Disk utilization" section inside the email report doesn't have the mentioned NFS.

Reviewers: daniel

Reviewed By: daniel

Subscribers: jenkins-bot, yugaware

Differential Revision: https://phabricator.dev.yugabyte.com/D10863

managed/devops/bin/cluster_health.py

@@ -252,7 +252,7 @@ def _remote_check_output(self, command):
         return output
 
     def get_disk_utilization(self):
-        remote_cmd = 'df -h 2>/dev/null'
+        remote_cmd = 'df -hl 2>/dev/null'
         return self._remote_check_output(remote_cmd)
 
     def check_disk_utilization(self):
@@ -406,7 +406,7 @@ def check_cqlsh(self):
 
         errors = []
         if not ('Connected to local cluster at {}:{}'
-                                .format(self.node, self.ycql_port) in output or
+                .format(self.node, self.ycql_port) in output or
                 "AuthenticationFailed('Remote end requires authentication.'" in output):
             errors = [output]
         return e.fill_and_return_entry(errors, len(errors) > 0)