BIND 10 #523: tests using ports shouldn't use same ports as running

[BIND 10 Development]

#523: tests using ports shouldn't use same ports as running
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           Reporter:  jreed         |                      Owner:
               Type:  defect        |                     Status:  new
           Priority:  major         |                  Milestone:
          Component:  Unclassified  |                   Keywords:
          Sensitive:  0             |  Estimated Number of Hours:  0
Add Hours to Ticket:  0             |                  Billable?:  1
        Total Hours:  0             |                  Internal?:  0
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 {{{
 [ RUN      ] ResolverConfig.listenAddresses
 Unable to set new address: Failed to initialize network servers: Address
 already in use
 terminate called after throwing an instance of 'std::exception'
   what():  St9exception
 [1]   Abort trap (core dumped) ${dir}${tst}
 }}}

 We should not use port 5300 for the default the server.

 And any unit tests should probably use some unassigned port number

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Ticket URL: <https://bind10.isc.org/ticket/523>
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