Catch Blobstore fetch-data() Exceptions
Catch Blobstore fetch-data() Exceptions

R=maruel@chromium.org
BUG=


Review URL: https://chromiumcodereview.appspot.com/12221115

git-svn-id: 8fa0a038c61565a87d0885d584517a2e12819dac@181690 0039d316-1c4b-4281-b951-d872f2087c98

pombreda/swarming,luci/luci-py,madecoste/swarming,luci/luci-py,pombreda/swarming,pombreda/swarming,luci/luci-py,madecoste/swarming,madecoste/swarming,madecoste/swarming,luci/luci-py,pombreda/swarming