Affecting 5.3.0-SNAPSHOT and 5.2.x branch

When using hot rod client the clear() operation deletes all entries also in the cache store

When using memcached client the flush_all operation deletes entries only in the memory

hotrod behaviour:
https://github.com/infinispan/infinispan/blob/5.3.x/server/hotrod/src/main/scala/org/infinispan/server/hotrod/Decoder10.scala#L183

memcached behaviour:
https://github.com/infinispan/infinispan/blob/5.3.x/server/memcached/src/main/scala/org/infinispan/server/memcached/MemcachedDecoder.scala#L354

shouldn't they be consistent ?