Add documentation about handling exceptions [DATAREST-746]

[spring-projects-issues]

Greg Turnquist opened DATAREST-746 and commented

Based on http://stackoverflow.com/questions/30245129/spring-data-rest-exception-handling-return-generic-error-response, capture the recommended way to process lower level exceptions, like DataAccessExceptions or others using Spring MVC standard tactics

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No further details from DATAREST-746