Move connection fulljid function

tests/unittests/test_cmd_disconnect.c

@@ -22,7 +22,7 @@ void clears_chat_sessions(void **state)
     chat_session_recipient_active("mike@server.org", "work", FALSE);
 
     will_return(connection_get_status, JABBER_CONNECTED);
-    will_return(session_get_fulljid, "myjid@myserver.com");
+    will_return(connection_get_fulljid, "myjid@myserver.com");
     expect_any_cons_show();
 
     gboolean result = cmd_disconnect(NULL, CMD_DISCONNECT, NULL);

tests/unittests/xmpp/stub_xmpp.c

@@ -27,7 +27,7 @@ jabber_conn_status_t session_connect_with_account(const ProfAccount * const acco
 void session_disconnect(void) {}
 void session_shutdown(void) {}
 void session_process_events(int millis) {}
-const char * session_get_fulljid(void)
+const char * connection_get_fulljid(void)
 {
     return (char *)mock();
 }