This also resulted in a refactoring of the Providers and parsing
Exceptions. NumberFormatException and ParseException can now be thrown
directly, the wrapping in a SmackParsingException is down at a higher
layer, i.e. in AbstractProvider.
capturing all outoing presences of type 'available' would also capture
presences not used for presence broadcast, e.g., MUC presences.
This caused the EntityCaps integration test (localEntityCaps) to fail
if the MUC integration test was run before.