Give Eh CacheManager a unique per-vhost name.
Give Eh CacheManager a unique per-vhost name.

Eh cache manager operates on class static data to consolidate instances by name.
Since multiple cache manager instances can exist within the same class loader
space, but for different vhosts, make sure to give them unique names.

(Something has likely changed in Spring4 Eh cache factory beans wrt. to this,
because shared cache instance in multiple-vhost scenario fails without unique
names now.)

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