anchor.diff:  Web requests will have an affinity to the primary owner of a given session.
   This is the default affinity for this distributed session manager.
   Behaves the same as affinity=local if the backing cache is not distributed nor replicated.
  +affinity=ranked:::
  +Web requests will have an affinity to the first available node in a ranked list comprised of: primary owner, backup nodes, local node (if not a primary nor backup owner).
  +Only for use with load balancers that support multiple routes.
  +Behaves the same as affinity=local if cache is not distributed nor replicated.
   
   e.g. Creating a new session management profile, using ATTRIBUTE granularity with local session affinity:
   
  
positive.code: [source,xml]
  ----
  <?xml version="1.0" encoding="UTF-8"?>
  <distributable-web xmlns="urn:jboss:distributable-web:1.0">
      <infinispan-session-management cache-container="foo" cache="bar" granularity="SESSION">
          <primary-owner-affinity/>
      </infinispan-session-management>
  
negative.code:             </cookie-config>
          </session-config>
      </shared-session-config>
      <distributable-web xmlns="urn:jboss:distributable-web:2.0">
          <session-management name="foo"/>
      </distributable-web>
  </jboss>
  