Test coverage for vnccollab.common

vnccollab/      covered 95% (12 of 287 uncovered)
    common/      covered 95% (12 of 287 uncovered)
        browser/      covered 90% (11 of 119 uncovered)
        searchutil.py      covered 97% (1 of 49 uncovered)
        cache.py      covered 100% (0 of 26 uncovered)
        interfaces.py      covered 100% (0 of 3 uncovered)
        livesearch.py      covered 100% (0 of 30 uncovered)
        portlets/      covered 100% (0 of 20 uncovered)
        testing.py      covered 100% (0 of 29 uncovered)
        upgrades/      covered 100% (0 of 0 uncovered)
        vocabularies.py      covered 100% (0 of 11 uncovered)