Commits on Feb 21, 2023

1. CURATOR-535: Fix client port conflict due to untrustworthy random por… …

   …t allocation
   
   This commit tries to solve port conflict for `TestingServer` if port is
   unspecified(aka. `port <= 0`):
   * Set `InstanceSpec.port` to 0 if port is unspecified.
   * Save OS chosen bind port after started to maintain same port across
     restart.
   
   Ideally, it should be possible to bootstrap `TestingCluster`(with unspecified ports)
   too with help from `reconfig`. But there are difficulties since election port, quorum
   port were not designed to be bound to `0` in ZooKeeper. `TestingServer` should be
   enough for most cases.
   
   Users should resort to other solutions(eg. container) if they got bored
   by port conflict due to usages of `TestingCluster` and
   `TestingServer.restart`.

   

   kezhuw committed Feb 21, 2023
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