Updating dhcp.template for leases

Signed-off-by: Shubhangi-dell <shubhangi_srivastava@dell.com>

control_plane/roles/control_plane_device/files/temp_dhcp.template

@@ -21,8 +21,8 @@ option pxe-system-type code 93 = unsigned integer 16;
 subnet subnet_mask netmask net_mask {
 option subnet-mask net_mask;
 range dynamic-bootp start end;
-default-lease-time  21600;
-max-lease-time  43200;
+default-lease-time default;
+max-lease-time max;
 next-server next_server;
 #insert the static DHCP leases for configuration here
 
@@ -44,4 +44,4 @@ next-server next_server;
 
 }
 
-#end for
+#end for