* minor cleanup pom
maven.compiler java versions as properties
only specifing spring-data-elasticsearch as dependency
formatting net.java.dev.jna dependency
grouping main/test and logging dependencies
removed unused org.springframework.data.version property
* updated logback conf to this example
* builder patttern code on multiple lines for readablilty
* autowire via constructor into final variable
as of spring-4.3 the @Autowired can be omitted \o/ jaj
* @ContextConfiguration with less config
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