Tidy three loose ends around sharing a session

Closing a console gives up its claim on the session, and that talks to the
bmc, so let it fail the same way the console's own deactivate is already
allowed to.

kg was left as the caller passed it in both the register key and the reuse
check, so the mismatch fixed for the name and password still applied to it.

The count for a new socket was taken before binding it and before the io
task was known to be up.  Take it last, once nothing is left that can still
fail.

confluent_server/aiohmi/ipmi/console.py

@@ -217,7 +217,12 @@ class Console(object):
         self.ipmi_session = None
         if sess.sol_handler is not None and sess.sol_handler.__self__ is self:
             sess.sol_handler = None
-        await sess.logout()
+        try:
+            await sess.logout()
+        except exc.IpmiException:
+            # A bmc that has stopped answering must not be what makes
+            # closing a console fail, as for the deactivate above
+            pass
 
     async def close(self):
         """Shut down an SOL session"""

confluent_server/aiohmi/ipmi/private/session.py

@@ -390,7 +390,6 @@ class Session(object):
             # Rather than wait until send() to bind, bind now so that we have
             # a port number allocated no matter what
             tmpsocket.bind(('', 0))
-            cls.socketpool[tmpsocket] = 1
         else:
             tmpsocket.bind(server[4])
         iosockets.append(tmpsocket)
@@ -413,6 +412,10 @@ class Session(object):
             initevt = asyncio.Event()
             iothreadwaiters.append(initevt)
             await initevt.wait()
+        if server is None:
+            # Take the count last: one taken for a socket no session ever
+            # received is one nobody is left to give back
+            cls.socketpool[tmpsocket] = 1
         return tmpsocket
 
     def _sync_login(self, response):
@@ -462,7 +465,8 @@ class Session(object):
                 keepalive=True):
         trueself = None
         forbidsock = []
-        sesskey = (bmc, _credkey(userid), _credkey(password), port, kg)
+        sesskey = (bmc, _credkey(userid), _credkey(password), port,
+                   _credkey(kg))
         for res in socket.getaddrinfo(bmc, port, 0, socket.SOCK_DGRAM):
             sockaddr = res[4]
             if ipv6support and res[0] == socket.AF_INET:
@@ -480,7 +484,7 @@ class Session(object):
                     if (self.bmc == bmc
                             and self.userid == _credkey(userid)
                             and self.password == _credkey(password)
-                            and self.kgo == kg):
+                            and _credkey(self.kgo) == _credkey(kg)):
                         trueself = self
                         break
                     # ok, the candidate seems to be working, but does not match