Make deadlock detection run over multiple caches

right now deadlock detection runs on a per cache basis.
Eg. following deadlock won't be detected:

• N1,N2 two nodes, A and B are cache running on each of them.

tx1 running on N1: N1.A.put(k1); N1.B.put(k2)
tx2 running in N2: N2.B.put(k2); N2.A.put(k1)