Changed startBackgroundDiscovery in YahooWeather Binding DiscoveryService to be executed asynchronously.

Signed-off-by: Dennis Nobel <d.nobel@external.telekom.de>
Merge pull request #95 from dnobel/yahoo-discovery-async

Changed startBackgroundDiscovery in YahooWeather Binding DiscoveryServic...
Changed ResolvedBundleTracker to an SynchronousBundleListener.

Signed-off-by: Dennis Nobel <d.nobel@external.telekom.de>
Merge pull request #97 from qivicon/bundlelistener-sync

Fixed timing issue in i18n test execution.
added mapdb tests to Maven build

Signed-off-by: Kai Kreuzer <kai@openhab.org>