Added REST endpoints, Exception Mappers for error responses, Tests for REST endpoints
Merge pull request #35 from smarthi/suneel

Added REST endpoints, Exception Mappers for error responses, Tests for REST endpoints
Minor changes following last commit, including moving exception mapper to lambda-serving
Abstract Base class for REST endpoints, modified REST endpoints to extend the abstract base class
Merge pull request #36 from smarthi/suneel

Abstract Base class for REST endpoints, modified REST endpoints
Harmonize fold-in with speed layer and collapse/refactor some usage of fold-in, marginally increasing accuracy/performance in some cases. Remove unused test code.
Tomcat 8.0.11
Enhance error message in exception, error response
Sever close dependency from ML serving apps and lambda-serving; should be less directly dependent
Fix speed layer update test to match recent updated fold-in logic, and make it more accurate
Add back lambda-serving dep for tests
Add optional CDH profile for testing and to access Hadoop 2.5.x
Overhaul AUC to simplify and clarify, and more accurately select negative instances
Remove System.out accidentally left in a test
Update to Hadoop 2.5, Jersey 2.12, RAT 0.11
Initial commit for /ingest and /preference
Fix issues from last local commit
Forgot to update example RAT to 0.11
Remove inefficient Joiner
First framework support for no-known-items for ALS