Minor pom cleanup
* re-enable the shirk-core tests jar as it was needed by another module
* allow building with JDK 1.8

git-svn-id: https://svn.apache.org/repos/asf/shiro/branches/2.0-api-design-changes@1666068 13f79535-47bb-0310-9956-ffa450edef68
3 files changed