Fixing the decryption issue during restoring the connection on restart.

As we convert the binary password to string during storing the
connection information, we also need to convert it back to byte-arrays
during restoring the connections.

Hence - decode the passowrd using 'utf-8' encoding during storing the
connection information, and encode it during restoring the connections.

web/pgadmin/utils/driver/psycopg2/__init__.py

@@ -1049,7 +1049,7 @@ class ServerManager(object):
 
         res = dict()
         res['sid'] = self.sid
-        res['password'] = str(self.password)
+        res['password'] = self.password.decode('utf-8')
 
         connections = res['connections'] = dict()
 
@@ -1151,6 +1151,10 @@ WHERE db.oid = {0}""".format(did))
         # first connection for identifications.
         from pgadmin.browser.server_groups.servers.types import ServerType
         self.pinged = datetime.datetime.now()
+        try:
+            data['password'] = data['password'].encode('utf-8')
+        except:
+            pass
 
         connections = data['connections']
         for conn_id in connections: