API Validation for Trove API

    Replaced validation with new and improved json schema validation
    Fixed malformed json schema bug #1177969
    Fixed integration test for create_user; correct databases
    Fixed integration for create_users; invalid character_set param

Implements: json-schema-support

Change-Id: I6ca09803654d9e78362fde69185b5b9e05a5eb6b
Merge "API Validation for Trove API"