ISPN-4078 Infinispan server user guide is not deployed on infinispan.org
ISPN-4130 Upgrade to Apache Avro 1.7.6
ISPN-3976 Protobuf marshalling on Indexed server caches interferes with keySet and bulk marshalling

This happens only in clustered caches because that's when map-reduce is used to collect the keys and
fails due to ClassCastException. The map-reduce task used to assume the values are byte[] which is no
longer true with remote query.
Disable unreliable test in DistSyncL1FuncTest -> follow up in ISPN-4133
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