add comments for NodeStates fields
add comments for NodeStates fields

NodeStates class members should add comments in
ironic/api/controllers/v1/node:NodeStates

Change-Id: Ica9eb00c7a4049043198218f7d1a2991448f623a

redhat-openstack/ironic,Tan0/ironic,dims/ironic,ionutbalutoiu/ironic,naototty/vagrant-lxc-ironic,bacaldwell/ironic,pshchelo/ironic,ramineni/myironic,bacaldwell/ironic,naterh/ironic,SauloAislan/ironic,openstack/ironic,supermari0/ironic,hpproliant/ironic,pshchelo/ironic,NaohiroTamura/ironic,rdo-management/ironic,devananda/ironic,ionutbalutoiu/ironic,naototty/vagrant-lxc-ironic,openstack/ironic,SauloAislan/ironic,dims/ironic,NaohiroTamura/ironic