Changing int-bridge-generate-mac flag at runtime doesn't work

Elan Manager provides following flag:

container elan-config {
config true;
leaf int-bridge-gen-mac

{ description "If true, generate a mac, else use the bridge generated mac"; type boolean; default true; }

But changing it at runtime throws many exceptions at runtime and elanmanager ends up in inconsistent state. Currently there is no option to set it at startup time, as with few other config flags.

So there are two issues here:
1. Changing it dynamically at runtime should not cause problems.
2. Should have the option to set it to non-default at startup.