Test coverage for vnccollab.common.browser

vnccollab/      covered 95% (12 of 287 uncovered)
    common/      covered 95% (12 of 287 uncovered)
        browser/      covered 90% (11 of 119 uncovered)
            search.py      covered 91% (6 of 68 uncovered)
            deferred.py      covered 90% (5 of 51 uncovered)
            __init__.py      covered 100% (0 of 0 uncovered)