Add support for SAML NameIDPolicy

[RoopGuron]

Signed-off-by: Dario amiri@ge.com

[cfdreddbot]

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[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/129878457

The labels on this github issue will be updated when the story is started.

[RoopGuron]

Add support for SAML NameIDPolicy
Summary of Changes:

1. Enhanced the IDP metadata generation components to publish explicitly the UAA SAML IDP's NameID Policy.
2. Enhanced the UAA IDP SAML Authentication Assertion to validate and if successful enumerate supported-requested NameID Format.
3. Enhanced UAA SAML SP registration component to validate the registering service provider supports at least one UAA supported NameID formats.
4. Added Tests for UAA SAML IDP NameID format.
5. Added Tests for UAA SAML IDP based Authentication.
6. Added Tests for UAA SAML SP NameID format.

[coveralls]

Coverage decreased (-0.07%) to 84.194% when pulling a3a62e6 on GESoftware-CF:saml_idp_email_nameid_support into 9b7139b on cloudfoundry:develop.

[coveralls]

Coverage decreased (-0.07%) to 84.194% when pulling a3a62e6 on GESoftware-CF:saml_idp_email_nameid_support into 9b7139b on cloudfoundry:develop.

[coveralls]

Coverage increased (+0.02%) to 84.281% when pulling a3a62e6 on GESoftware-CF:saml_idp_email_nameid_support into 9b7139b on cloudfoundry:develop.