[Merge] lp:~muktupavels/libappindicator/no-host into lp:libappindicator

[Alberts Muktupāvels]

indicator-application-service does not support RegisterStatusNotifierHost method, but it does return TRUE for IsStatusNotifierHostRegistered.
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https://code.launchpad.net/~muktupavels/libappindicator/no-host/+merge/386817
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