log: cleanup and uniformize

src/jamidht/account_manager.cpp

src/jamidht/channeled_transport.cpp

src/jamidht/conversation.cpp

src/jamidht/conversation_channel_handler.cpp

src/jamidht/conversation_module.cpp

src/jamidht/conversationrepository.cpp

src/jamidht/jamiaccount.cpp

src/jamidht/swarm/swarm_manager.cpp