Checkpoint for OPENDJ-1303 "opendj-cli"
- Fixed isDN function.
- LDAPManagementContextFactory.java :removed the unused alwaysSSL var.
- LDAPConnectionConsoleInteraction.java : 
  -- removed unused parameter canUseSSL.
  -- modified the cannotReadConnectionParameters => more clearer. (thanks to JN)
N.B This LDAPConnectionConsoleInteraction class will disapear as soon as the SDK will provide the same 'prompt' capabilities.
(and also because the code is absolutely unmaintainable and redundant.)