Changes to replace clagid setting in the bonding driver with -

1. clag_enable flag in the bonding driver
2. And clagid in clagd

Ticket: CM-4091
Reviewed By:
Testing Done: yes

1. Two new commands have been introduced in clagctl - setclagid and showclagid.
These commands will be used by ifupdown2 to set and read/check the clagid.
2. In addition a bit will be maintained per-bond in the bonding driver to
indicate if a bond is a CLAG bond.
(cherry picked from commit cb160bad45d330fe5f544d0d9a40c1c77b9b563f)

ifupdownaddons/utilsbase.py

@@ -36,6 +36,14 @@ class utilsBase(object):
         self.PERFMODE = kargs.get('perfmode', False)
         self.CACHE = kargs.get('cache', False)
 
+    def is_process_running(self, procName):
+        try:
+            self.exec_command('/bin/pidof -x %s' % procName)
+        except:
+            return False
+        else:
+            return True
+
     def exec_commandl(self, cmdl, cmdenv=None):
         """ Executes command """