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JIRA: https://jira.spring.io/browse/INT-3780 - Move `s-i-test` to top of file to avoid deprecation warning - Change `jacoco` to use the Gradle plugin - Enable generation of `jacoco` coverage html report - Hibernate tests need `javax.persistence` `2.1` eclipselink pulls in `2.0`; works ok with gradle 2.3, but with 2.5 the 2.0 versions are loaded. - replace `jpaApiVersion` build variable with the `jpa21ApiVersion`