cisco-vnmc: Don't create Protocol using deprecated SecureProtocolSocketFactory

Latest httpclient library suggests when creating Protocol object for use
with the apache common httpclient class, they should avoid using the
deprecated Protocol signature which takes in SecureProtocolSocketFactory

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
SAML2AuthManagerImpl: let the component return true on start

- Return super.true() even if plugin is not enabled
- Return empty list when getCommands is called

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>