Fixes bug loading API tokens page.
Added test using our new workbench testing framework to make sure it doesn't happen again.
Merge branch 'master' of git.clinicalfuture.com:arvados

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Merge branch 'master' of git.clinicalfuture.com:arvados

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
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# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.