Corrects a typo in RESTful Web API (v1) document
Corrects a typo in RESTful Web API (v1) document

The typo /v1/nodes/<uuid>/state is changed to /v1/nodes/<uuid>/states
Closes-Bug: 1311285

Change-Id: I66bc695298c04b423c9c9be45b23fce5b60727f0

SauloAislan/ironic,redhat-openstack/ironic,Tan0/ironic,Tehsmash/ironic,NaohiroTamura/ironic,rackerlabs/ironic,naototty/vagrant-lxc-ironic,supermari0/ironic,pshchelo/ironic,faizan-barmawer/openstack_ironic,dims/ironic,ionutbalutoiu/ironic,ionutbalutoiu/ironic,pshchelo/ironic,hpproliant/ironic,openstack/ironic,openstack/ironic,NaohiroTamura/ironic,froyobin/ironic,ramineni/myironic,bacaldwell/ironic,SauloAislan/ironic,bacaldwell/ironic,naototty/vagrant-lxc-ironic,debayanray/ironic_backup,rdo-management/ironic,dims/ironic,naterh/ironic,devananda/ironic