Feeds update in feedreader plugin should not fail completely if one feed fails to update correctly

In the feedreader plugin, in the updateFeedsInSpace() method, apparently if the update of a feed fails for some reason (and throws an exception), the whole update is interrupted by this failure, and none of the feeds that follows is updated. This failure should be caught and the update should continue with the other feeds.

This is useful for the reader application, which uses the feedreader plugin.