Raise max password length

[ChandonPierre]

Maximum password length appears to be hardcoded to 20:

cloudbase-init/cloudbaseinit/osutils/windows.py

Lines 1697 to 1698 in 912eea8

	def get_maximum_password_length(self):
	return 20

Modern/currently supported versions of Windows should be able to accept password lengths of 128 characters.

[daevski]

yeah, what is going on here??? This is not correct and needs to be updated! Thanks for creating this issue @ChandonPierre.

Workaround for now, set a 30 char password and then after build change it what you really need.