Remove threadLocal in org.infinispan.context.AbstractInvocationContextContainer

The javadocs in org.infinispan.context.AbstractInvocationContextContainer mention:

// See ISPN-1397. There is no real need to store the InvocationContext in a thread local at all, since it is passed
// as a parameter to any component that requires it - except for two components at the moment that require reading
// the InvocationContext from a thread local. These two are the ClusterCacheLoader and the JBossMarshaller. The
// former can be fixed once the CacheStore SPI is changed to accept an InvocationContext (see ISPN-1416) and the
// latter can be fixed once the CacheManager architecture is changed to be associated with a ClassLoader per
// CacheManager (see ISPN-1413), after which this thread local can be removed and the getInvocationContext() method
// can also be removed.