ISPN-2632 Uneven request balancing after node crash

https://issues.jboss.org/browse/ISPN-2632

Send the cache topology id to the client instead of the JGroups view id.
After a rebalance, the cache topology id is incremented, so this ensures
that the client's topology information is updated as well.

To work properly with replicated caches, this change required always incrementing the cache topology id after a leave, even if without a rebalance (https://issues.jboss.org/browse/ISPN-2420).