Updated POM

Use proper XSD for maven
Updated to mybatis-parent 22-SNAPSHOT
Changed <name> to match <artifactId>
Updated mybatis to 3.2.7
Removed findbugs dependency - wasn't part of project and was extremely
old
Updated hsqldb to 2.3.2
Replaced log4j test dependency with slf4j-simple which fixes warnings in
maven and still logs properly.