Add error handling for connection reset when pulling the topology and the OXP is still booting up #159
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Fix #144
Description of the change
This change adds a minimal enhancement on the error handling process while pulling the topology from OXP and the OXP is not accessible (e.g., OXP is still booting up or during a maintenance window) -- resulting in ConnectionReset (not previously handled).
Local tests following the guidelines for single server deployment showed this fix was effective to avoid exceptions and crash of the topology pulling script.