Enable running multiple tablet servers per node

[keith-turner]

I tried running 2 tablet servers per node and had to add the following to accumulo-site.xml. Would be nice to just add these.

  <property>
    <name>tserver.port.search</name>
    <value>true</value>
  </property>

  <property>
    <name>replication.receipt.service.port</name>
    <value>10002-10009</value>
  </property>