Fixing logs related to connection establishment

[Hema-Mathiyazhagan]

Log messages shown during nzpy connection establishment are in bytes.
Database name log message is not showing database name.

DEBUG:nzpy.Connection[db1]:Database name: db1
INFO:nzpy.Connection[db1]:Backend response: N
DEBUG:nzpy.Connection[db1]:Security Level requested = 1
DEBUG:nzpy.Connection[db1]:Got response =b'N'
DEBUG:nzpy.Connection[db1]:Attempting unsecured session
DEBUG:nzpy.Connection[db1]:Connection protocol set to : 3 5
INFO:nzpy.Connection[db1]:Backend response: N
INFO:nzpy.Connection[db1]:Backend response: N
INFO:nzpy.Connection[db1]:Backend response: N
INFO:nzpy.Connection[db1]:Backend response: N
INFO:nzpy.Connection[db1]:Backend response: N
INFO:nzpy.Connection[db1]:Backend response: N
DEBUG:nzpy.Connection[db1]:Got response: b'R'
DEBUG:nzpy.Connection[db1]:auth got 'R' - request for password