Fix loss of error info in UrlConnectionException

[weiminyu]

It does not get the error message for 400+ status codes.

It fails to get the status code if the response has neither data nor error.

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This change is 

[jianglai]

The PR description should say what the PR does, not describe a problem.

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @weiminyu)

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util/src/main/java/google/registry/util/UrlConnectionException.java line 47 at r1 (raw file):

              responseCode < 400 ? connection.getInputStream() : connection.getErrorStream());
    } catch (IOException | NullPointerException e) {
      resultContent = "-- Response is missing or has malformed content --".getBytes(UTF_8);

Is the content malformed? It is more like non-existent,right?

[weiminyu]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @jianglai)

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util/src/main/java/google/registry/util/UrlConnectionException.java line 47 at r1 (raw file):

Previously, jianglai (Lai Jiang) wrote…

Is the content malformed? It is more like non-existent,right?

'is missing or has malformed'. The latter would be the cause of an IOException.

[weiminyu]

Done

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @jianglai)