Close InputStream in case of exception

[wasabii]

InputStream not being closed on exception. Causes a test to fail under some conditions.

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Progress

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u.git pull/81/head:pull/81
$ git checkout pull/81

Update a local copy of the PR:
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$ git pr checkout 81

View PR using the GUI difftool:
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[bridgekeeper]

Hi @wasabii, welcome to this OpenJDK project and thanks for contributing!

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[wasabii]

/signed

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[gnu-andrew]

1. Changes for OpenJDK 8 should go to https://github.com/openjdk/jdk8u-dev unless they are a regression fix for an upcoming release during the "rampdown" period; see https://wiki.openjdk.org/display/jdk8u/Main for details and the release schedule.
2. We rarely accept new changes into OpenJDK 8 as it is a stable released version. New changes should instead go to https://github.com/openjdk/jdk and then be backported through the various stable releases. This ensures fixes are not regressed in later releases. In the case of this change, a fix was already introduced in OpenJDK 9 - https://bugs.openjdk.org/browse/JDK-8013586 - so the appropriate thing to do would be to backport this change to 8u-dev. It is more involved than your fix, as it fixes the same issue in multiple providers and also refactors some methods so they are provided by a common superclass.