Cipango-console: Minor improvements when used in embedded mode

Signed-off-by: Nicolas <nicolas@cipango.org>
Prevent NullPointerException when no connectors are set

Signed-off-by: Nicolas <nicolas@cipango.org>
Add missing method that creates a StackOverflowError when a Sip App failed to deploy

Signed-off-by: Nicolas <nicolas@cipango.org>
Ensure listeners can be called even if SipApp is null

Signed-off-by: Nicolas <nicolas@cipango.org>