Update process doc to be more generic about point of contact
Update process doc to be more generic about point of contact

The docs currently name a past PTL by IRC nick -- update it to be
more generic so we don't have to update it every time the PTL
changes.

Change-Id: I31dbf0ee4f7650389e824c25c3aea7529d63eaa0

gooddata/openstack-nova,openstack/nova,rahulunair/nova,klmitch/nova,mahak/nova,mikalstill/nova,gooddata/openstack-nova,openstack/nova,klmitch/nova,mahak/nova,rahulunair/nova,klmitch/nova,gooddata/openstack-nova,mikalstill/nova,klmitch/nova,mikalstill/nova,gooddata/openstack-nova,openstack/nova,rahulunair/nova,mahak/nova