[LIVEOAK-2] Wire up interceptors.

Many interceptors may now be installed immediately after decoding
the resource request (or before encoding the response).  Every
interceptor is bi-directional, but can choose to ignore either
half of the interaction should it like.

An interceptor may replace/alter the request and/or the response,
and may decide to send a response on its own, short-circuiting the
remainder of the container processing.
LIVEOAK-61: Add RootMongoResource configuration tests
Merge pull request #49 from mwringe/LIVEOAK-61

LIVEOAK-61: Add RootMongoResource configuration tests
Keycloak module and updates to authz
Merge pull request #50 from liveoak-io/keycloak

Keycloak module and updates to authz
LIVEOAK-62 Fix mongo default host and port
Merge pull request #51 from stianst/master

LIVEOAK-62 Fix mongo default host and port
Add thirdparty repo, to try.
Fix URL.