fixed an issue cuaisng router to die

- router should not die when an error happens when connecting to HW
+ install will restart changed network interfaces

install.py

@@ -12,7 +12,7 @@ from ipaddress import IPv4Interface
 from configparser import ConfigParser
 from os.path import join, getmtime, exists
 
-os.chdir('to_system')
+os.chdir('/root/aputools/to_system')
 
 DEL = '__to_delete__'
 CFGPATH = '/root/aputools/servercfg/%s.cfg'
@@ -173,6 +173,8 @@ def network(doit):
                 if doit:
                     with open('/etc/sysconfig/network-scripts/ifcfg-%s' % ifname, 'w') as f:
                         f.write('%s\n' % '\n'.join('%s=%s' % kv for kv in content.items()))
+                    os.system('ifdown %s' % ifname)
+                    os.system('ifup %s' % ifname)
                 else:
                     dirty = 'dirty'
                     print('%s changed:' % ifname)