In the past, Spring Data JDBC performed autoconfiguration such as gleaning whether or not MyBatis is on the classpath, and also whether or not certain other beans exist. This commit removes such flexible settings and instead wires up a JdbcMappingContext seeking an optional NamingStrategy and optional ConversionCustomizer. The other required beans will alert the end user if they don't exist.
All relevant test cases are updated to inject the proper components.
All autoconfiguration is being moved outside Spring Data JDBC, to eventually join Spring Boot after being shook out as an independent module.
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