Fix watermarkstat CLI script.

Since PG/Queue counters are created only if they are configured in the switch, it is not enough to relay only on the first entry in the DB.
We need to go over all configured counters, check what is the max configured, and build the table accordingly.

Signed-off-by: Shlomi Bitton <shlomibi@nvidia.com>

scripts/watermarkstat

@@ -208,16 +208,16 @@ class Watermarkstat(object):
 
  self.header_list = ['Port']
  header_map = wm_type["obj_map"]
- single_key = list(header_map.keys())[0]
- header_len = len(header_map[single_key])
- min_idx = sys.maxsize
-
- for name, counter_oid in header_map[single_key].items():
- curr_idx = int(wm_type["idx_func"](counter_oid))
- min_idx = min(min_idx, curr_idx)
-
- self.min_idx = min_idx
- self.header_list += ["{}{}".format(wm_type["header_prefix"], idx) for idx in range(self.min_idx, self.min_idx + header_len)]
+ self.min_idx = 0
+ max_idx = 0
+ 
+ for port in header_map.keys():
+  for element in header_map[port].keys():
+  element_idx = int(element.split(':')[1])
+  if (element_idx > max_idx):
+ max_idx = element_idx
+
+ self.header_list += ["{}{}".format(wm_type["header_prefix"], idx) for idx in range(self.min_idx, max_idx)]
 
  def get_counters(self, table_prefix, port_obj, idx_func, watermark):
  """