Rename console methods in port manager to use the generic tcp term in the name.

Fixes bug when a console port is allocated to a Ghost VM instance and not released.
Warnings at exit when TCP/UDP ports are still allocated.

gns3server/modules/virtualbox/virtualbox_vm.py

@@ -299,7 +299,7 @@ class VirtualBoxVM(BaseVM):
         yield from self.stop()
 
         if self._console:
-            self._manager.port_manager.release_console_port(self._console)
+            self._manager.port_manager.release_tcp_port(self._console)
             self._console = None
 
         if self._linked_clone: