systemvm: Fixes #2805 set gateway to empty string than None to avoid arping on 'None' (#2806)

Arping command in virtual-router was called anyway on python code.

on file: merge.py
line 239, in this code : "dp['gateway'] ='None' ''

later on CsAddress.py line 303

if 'gateway' in self.address:
self.arpPing()

This string 'None' makes if steatement always be true
the solution on #2806 makes dp['gateway'] =''

Cannot be None type because there is a string operation later on code.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

systemvm/debian/opt/cloud/bin/merge.py

@@ -236,7 +236,7 @@ class updateDataBag:
                 if('localgw' in self.qFile.data['cmd_line']):
                     dp['gateway'] = self.qFile.data['cmd_line']['localgw']
                 else:
-                    dp['gateway'] = 'None'
+                    dp['gateway'] = ''
             dp['nic_dev_id'] = num
             dp['nw_type'] = nw_type
             qf = QueueFile()