Support/Use propagated ssh-keys about perunkeystoneadapter

[jkrue]

After nearly 3 years it is time to integrate this feature. The following data is propagated for each user :

{
      "blacklisted" : null,
      "status" : "VALID",
      "login-namespace:elixir" : "user3",
      "login-namespace:elixir-persistent" : "[email protected]",
      "denbiVmsRunning" : null,
      "id" : 50002,
      "preferredMail" : "user3@donotuse",
      "sshPublicKey" : [
               "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC580K3zIwR59Ur+A6NkcWYufWTUaSmrDFWiobhtLUXauqQFyYpJHXOfp4ZtPYtnlLDRFhlCdIta1NgYGx2klJa/ySObSmbaasg7gCRClTMRS/6vCOg3Vkw6JbQX1Si8xLVsy1dlpR9rf5PW3o7pPVZ8nRMwDN+qtqLNdFjhzjEmpEsFSFWDvXgGvCqWBEI0Zhutv3xdtb3yBI0oM2pJgGNbUCr3Hz2X2bVoLIxx0BvjWMjxGztBDDAcxGmaoJS6W0sTqWOX5EagA7fQAY3XTRJ6PMGJWfsdTsztmosBNYfOGtdq6/Gbjo40d/fxCWVY9z/a9o/kyls/XghwLIAZl4h [email protected]"
            ]
}

We should also optional add "login-namespace:elixir", which can be useful when building multi-user-environments on top of the keystone project memberlist. The property "login-namespace:elixir can be used as username.

[jkrue]

fixed with #38