fix(oracle): fix subnet selection logic #461
Merged
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When a subnet is not associated with an availability domain (AD),
we should not ignore the subnet just because it does not match our
configured AD. This change fixes the subnet selection logic to first
check if the subnet is associated with an AD before checking if it
matches the configured AD.
Before this change, the subnet selection logic was flawed and would
say it was using a certain subnet, but due to this bad AD logic, it
would actually not actually use the subnet it said it was using.
New unit test file was added that provides 100% coverage of the
get_subnet_id function!