read password policy from blueprint

[cloudgge]

blueprint registry configuration like

  "password-policy": {
    "must_contain_capital_letter": "true",
    "must_contain_lower_case_letter": "true",
    "must_contain_digit": "true",
    "must_contain_special_character": "true",
    "min_length": "14"
  }

used for user-management, also to be used in redmine to have a more consistent password policy across applications.