<hash> and <l1> settings are ignored when read from the configuration file and inherited from the default cache

This might have a dramatic impact performance, caused by uneven distribution.

Here's the result form an radargun benchmark.
Key distribution in 5.0.Final:
Cluster size: 4 -> ( 9818 10242 9898 9899)
Cluster size: 6 -> ( 9724 9585 10152 9964 9739 10115)
Cluster size: 8 -> ( 9260 9680 9971 9378 10079 10086 10274 10017)

Key distribution in 5.1.Final:
Cluster size: 4 -> ( 15505 13698 5918 4482)
Cluster size: 6 -> ( 8761 7820 17145 8188 12827 4183)
Cluster size: 8 -> ( 8391 6302 10773 22068 3589 200 3050 25211)