- removed generics from Cache/CacheManager (they add no value since it's an SPI not API) + update docs and tests + renamed ConcurrentCacheFactoryBean to ConcurrentMapCacheFactoryBean
- removed generics from Cache/CacheManager (they add no value since it's an SPI not API) + update docs and tests + renamed ConcurrentCacheFactoryBean to ConcurrentMapCacheFactoryBean