Steps to reproduce:
jboss-datagrid-7.0.0-server/bin/standalone.sh
jboss-datagrid-7.0.0-server/bin/ispn-cli.sh
[disconnected /] connect
[standalone@localhost:9990 /] container local
[standalone@localhost:9990 cache-container=local] cache default
[standalone@localhost:9990 local-cache=default] encoding memcached
[standalone@localhost:9990 local-cache=default] put key value
[standalone@localhost:9990 local-cache=default] get key
value
[standalone@localhost:9990 local-cache=default] encoding none
[standalone@localhost:9990 local-cache=default] get key
"dmFsdWU="

expected result (from JDG.7.0.0.ER1):
...
[standalone@localhost:9990 local-cache=default] encoding none
[standalone@localhost:9990 local-cache=default] get key
No serializer found for class org.infinispan.server.memcached.MemcachedValue and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS) )