master: fix crash when aborting early e.g. when failing to open listening socket

Pre-mortem data:
Traceback (most recent call last):
File "neo/master/app.py", line 172, in run
self._run()
File "neo/master/app.py", line 180, in _run
self.listening_conn = ListeningConnection(self, None, self.server)
File "neo/lib/connection.py", line 298, in __init__
connector.makeListeningConnection()
File "neo/lib/connector.py", line 133, in makeListeningConnection
self._error('listen', e)
File "neo/lib/connector.py", line 93, in _error
raise ConnectorException
ConnectorException
Traceback (most recent call last):
  File "neomaster", line 50, in <module>
    sys.exit(neo.scripts.neomaster.main())
  File "neo/scripts/neomaster.py", line 31, in main
    app.run()
  File "neo/master/app.py", line 175, in run
    self.log()
  File "neo/master/app.py", line 167, in log
    if self.pt is not None:
AttributeError: 'Application' object has no attribute 'pt'

neo/admin/app.py

@@ -197,12 +197,6 @@ class Application(BaseApplication, Monitor):
         self.master_conn = None
         self.master_node = None
 
-    def log(self):
-        self.em.log()
-        self.nm.log()
-        if self.pt is not None:
-            self.pt.log()
-
     def run(self):
         try:
             self._run()

neo/lib/app.py

@@ -103,6 +103,13 @@ class BaseApplication(object):
         self.em.close()
         self.__dict__.clear()
 
+    def log(self):
+        self.em.log()
+        self.nm.log()
+        pt = self.__dict__.get('pt')
+        if pt is not None:
+            pt.log()
+
     def setUUID(self, uuid):
         if self.uuid != uuid:
             self.uuid = uuid

neo/lib/threaded_app.py

@@ -98,13 +98,6 @@ class ThreadedApplication(BaseApplication):
     def setHandlerData(self, data):
         self._thread_container.answer = data
 
-    def log(self):
-        self.em.log()
-        self.nm.log()
-        pt = self.__dict__.get('pt')
-        if pt is not None:
-            pt.log()
-
     def _handlePacket(self, conn, packet, kw={}, handler=None):
         """
           conn

neo/master/app.py

@@ -162,13 +162,10 @@ class Application(BaseApplication):
         super(Application, self).close()
 
     def log(self):
-        self.em.log()
+        super(Application, self).log()
+        self.tm.log()
         if self.backup_app is not None:
             self.backup_app.log()
-        self.nm.log()
-        self.tm.log()
-        if self.pt is not None:
-            self.pt.log()
 
     def run(self):
         try:

neo/master/backup_app.py

@@ -88,6 +88,7 @@ class BackupApplication(object):
             logging.info('Upstream Node ID: %s', uuid_str(uuid))
 
     def log(self):
+        logging.info('Backup:')
         self.nm.log()
         if self.pt is not None:
             self.pt.log()

neo/storage/app.py

@@ -147,12 +147,9 @@ class Application(BaseApplication):
         self.em.poll(1)
 
     def log(self):
-        self.em.log()
-        self.nm.log()
+        super(Application, self).log()
         if self.tm:
             self.tm.log()
-        if self.pt is not None:
-            self.pt.log()
 
     def loadConfiguration(self):
         """Load persistent configuration data from the database.