Better support for identity in YANG schemas
Better support for identity in YANG schemas

Lookup identities lazily, like features, to allow them to reference
each other.  Resolve "base" substatements to fully-qualified identity
names.

dpino/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,dpino/snabb,alexandergall/snabbswitch,Igalia/snabb,eugeneia/snabb,eugeneia/snabbswitch,snabbco/snabb,SnabbCo/snabbswitch,Igalia/snabb,Igalia/snabbswitch,alexandergall/snabbswitch,SnabbCo/snabbswitch,snabbco/snabb,eugeneia/snabbswitch,Igalia/snabbswitch,snabbco/snabb,eugeneia/snabb,snabbco/snabb,alexandergall/snabbswitch,Igalia/snabb,Igalia/snabb,eugeneia/snabb,dpino/snabbswitch,snabbco/snabb,Igalia/snabb,Igalia/snabbswitch,alexandergall/snabbswitch,eugeneia/snabbswitch,snabbco/snabb,alexandergall/snabbswitch,Igalia/snabb,SnabbCo/snabbswitch,dpino/snabbswitch,Igalia/snabbswitch,Igalia/snabbswitch,Igalia/snabb,eugeneia/snabb,dpino/snabbswitch,alexandergall/snabbswitch,alexandergall/snabbswitch,dpino/snabb,dpino/snabb,eugeneia/snabb,dpino/snabb,dpino/snabb,Igalia/snabb,alexandergall/snabbswitch,eugeneia/snabbswitch,eugeneia/snabb,dpino/snabbswitch,eugeneia/snabb,dpino/snabb,SnabbCo/snabbswitch