Refactoring remote client to use new ping methods

* Removed obsolete _is_instance_reachable method
* Updated connectivity checks in Windows and Linux remote client code
  to use new ping_until_reachable method
* Added InvalidAddressFormat exception

Change-Id: I588e26a16e8f9b829c48177a35ff8d816f97bcf9
Merge "Refactoring remote client to use new ping methods"