removed-as-of-ocata

things to remove:

keystone/auth/plugins/saml2.py
keystone/common/cache/backends/memcache_pool.py
keystone/common/cache/backends/mongo.py
keystone/common/cache/backends/noop.py
keystone/contrib/simple_cert/routers.py
keystone/contrib/admin_crud/core.py
keystone/contrib/user_crud/core.py
keystone/contrib/endpoint_filter/backends/sql.py
keystone/contrib/federation/backends/sql.py
keystone/contrib/oauth1/backends/sql.py
keystone/contrib/revoke/backends/sql.py
keystone/contrib/endpoint_filters/routers.py
keystone/contrib/federation/routers.py
keystone/contrib/oauth1/routers.py
keystone/contrib/revoke/routers.py
keystone/token/persistence/backends/memcache_pool.py
keystone/token/persistence/backends/memcache.py
enabled option in keystone/conf/endpoint_policy.py
enabled option in keystone/conf/os_inherit.py
domain_id_immutable option in keystone/conf/default.py
httpd/keystone.py
keystone/service.py
all of PKI
all of PKIz
all of write support for LDAP
all stable driver interfaces
admin_token by default in the pipeline

Gerrit topic: https://review.openstack.org/#q,topic:bp/removed-as-of-ocata,n,z

Addressed by: https://review.openstack.org/374489
    remove deprecated items from contrib

Addressed by: https://review.openstack.org/374504
    remove deprecated config options

Addressed by: https://review.openstack.org/374499
    remove memcache token persistence backends

Addressed by: https://review.openstack.org/374482
    WIP: remove LDAP write support

Addressed by: https://review.openstack.org/374479
    WIP: remove support for PKI and PKIz tokens

Addressed by: https://review.openstack.org/375109
    Undeprecate options used for signing

Addressed by: https://review.openstack.org/375121
    Simplify tests after PKI removal

Addressed by: https://review.openstack.org/375914
    create release notes for removed functionality

Addressed by: https://review.openstack.org/375928
    remove stable driver interfaces

Addressed by: https://review.openstack.org/378588
    Remove the check for admin token in build_auth_context middleware

Addressed by: https://review.openstack.org/387730
    Follow-on of memcache token persistence removal

Addressed by: https://review.openstack.org/391069
    Clarifying on the remove of `build_auth_context` middleware

Addressed by: https://review.openstack.org/391082
    Remove `AdminTokenAuthMiddleware` from default configuration

Addressed by: https://review.openstack.org/397456
    Remove reference to future removal of saml

Addressed by: https://review.openstack.org/398795
    Remove entry_points to non-existent drivers

Addressed by: https://review.openstack.org/405679
    Remove CONF.os_inherit.enabled

Addressed by: https://review.openstack.org/423572
    WIP: Remove LDAP Support

Addressed by: https://review.openstack.org/424850
    Remove code supporting moving resources between domains