Bug 2177 - Updated SwitchConnectionProviderImpl

 - added test packaging - to be able to use ConnectionConfigurationImpl in both
   spi and impl

SwitchConnectionProviderImpl:
 - skipped checks for null and already running serverFacade as those are no longer
   needed when using ConfigSubsystem (startup())
 - added check for unknown transport protocol received (createAndConfigureServer())
ExperimenterMessageFactory:
 - fixed EXPERIMENTER_ID_INDEX constant
MessageFactoryInitializer:
 - added Experimenter message deserializers registration

Change-Id: I382d7fed0b626050847dafd47e691b7c9c902285
Signed-off-by: Michal Polkorab <michal.polkorab@pantheon.sk>