Disable HostResolverImplTest.CanceledRequestsReleaseJobSlots
Disable HostResolverImplTest.CanceledRequestsReleaseJobSlots

It times out flakily.

BUG=117187
TEST=
TBR=szym@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9619012

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@125406 0039d316-1c4b-4281-b951-d872f2087c98

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