odl-tsdr-cassandra-persistence depends on non-odlparent guava version

dl-tsdr-cassandra-persistence feature depends on:
<bundle>wrap:mvn:com.datastax.cassandra/cassandra-driver-core/2.1.2</bundle>
which requires:
<bundle>wrap:mvn:com.google.guava/guava/${guava.old.version}</bundle>.
<guava.old.version>16.0.1</guava.old.version>.

This is an issue since odl-restconf is being upgraded to use jersey 2.X, which relies on guava version from odlparent.