Standardize examples requirements and common functionality

[gabrielg5]

This PR aims to standardize some examples requirements and group them in a single utils script that could be leveraged by existing and future examples.

Shared Functionality

Logging initialization

• Added flags -ts and -debug to every example
• Created a single function to initialize logging and call it from all examples...
  

  impacket/impacket/examples/logger.py

  Line 57 in 8b4e374

  def init(ts=False, debug=False):

LDAP Login

• Extracted common LDAP login functions - calling them from examples that were redefining it
  

  impacket/impacket/examples/utils.py

  Line 86 in 8b4e374

  def ldap3_kerberos_login(connection, target, user, password, domain='', lmhash='', nthash='', aesKey='', kdcHost=None, TGT=None, TGS=None, useCache=True):

  
  

  impacket/impacket/examples/utils.py

  Line 233 in 8b4e374

  def init_ldap_session(domain, username, password, lmhash, nthash, k, dc_ip, aesKey, use_ldaps):

Identity Parsing

• Extracted identity parsing functionality and replaced it in examples that were needing it
  

  impacket/impacket/examples/utils.py

  Line 258 in 8b4e374

  def parse_identity(credentials, hashes=None, no_pass=False, aesKey=None, k=False, getpass_msg='Password:'):