title: Corrupted data exception when run gremlin script
body: <p>JanusGraph 0.3.2 + Scylla as storage.</p>
  
  <blockquote>
    <p><code>gremlin&gt;  g.V(24624).valueMap(true)
    Invalid flag encountered in serialization: -96. Corrupted data.
    Type ':help' or ':h' for help.
    Display stack trace? [yN] 
    java.lang.IllegalArgumentException: Invalid flag encountered in serialization: -96. Corrupted data.
            at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145)
            at org.janusgraph.graphdb.database.serialize.StandardSerializer.readObjectInternal(StandardSerializer.java:257)
            at org.janusgraph.graphdb.database.serialize.StandardSerializer.readObject(StandardSerializer.java:238)
            at org.janusgraph.graphdb.database.EdgeSerializer.readPropertyValue(EdgeSerializer.java:205)
            at org.janusgraph.graphdb.database.EdgeSerializer.readPropertyValue(EdgeSerializer.java:195)
            at org.janusgraph.graphdb.database.EdgeSerializer.parseRelation(EdgeSerializer.java:129)
            at org.janusgraph.graphdb.database.EdgeSerializer.readRelation(EdgeSerializer.java:73)
            at org.janusgraph.graphdb.transaction.RelationConstructor.readRelation(RelationConstructor.java:70)
            at org.janusgraph.graphdb.transaction.RelationConstructor$1.next(RelationConstructor.java:57)
            at org.janusgraph.graphdb.transaction.RelationConstructor$1.next(RelationConstructor.java:45)
            at org.janusgraph.graphdb.query.LimitAdjustingIterator.next(LimitAdjustingIterator.java:94)
            at com.google.common.collect.Iterators$7.computeNext(Iterators.java:651)
            at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
            at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
            at org.janusgraph.graphdb.query.ResultSetIterator.nextInternal(ResultSetIterator.java:54)
            at org.janusgraph.graphdb.query.ResultSetIterator.&lt;init&gt;(ResultSetIterator.java:44)</code></p>
  </blockquote>