Fixing case where pinning is a list of ranges

This was happening with intel MPI when mpiexec is also matched.  Example
of pinning: 0-3,16-19,32-35,48-51

experimental/check_app_pinning_tool/check_app_pinning.py

@@ -355,14 +355,17 @@ def find_last_core_id(process_d):
    
 
 def conv_indx_str_to_list(indx_str):
-    indx_l = []
-    if "-" in indx_str:
-       indx_str_l = indx_str.split("-")
-       return list(range(int(indx_str_l[0]),int(indx_str_l[1])+1))
-    elif "," in indx_str:
-       return list(map(int, indx_str.split(",")))
+   if "," in indx_str:
+      parts = indx_str.split(",")
    else:
-       indx_l.append(int(indx_str))
+      parts = [indx_str]
+   indx_l = []
+   for part in parts:
+      if "-" in part:
+         indx_str_l = part.split("-")
+         indx_l += list(range(int(indx_str_l[0]),int(indx_str_l[1])+1))
+      else:
+         indx_l.append(int(part))
    return indx_l