Fix test cleanup to add Supplier table
Merge pull request #25 from karkum/Fix-failing-test

Fix test cleanup to add Supplier table
[maven-release-plugin] prepare release jpile-1.7.4
[maven-release-plugin] prepare for next development iteration
Now that opower-parent:2.0.0 is out on maven-central, we can centralize some of our build configurations (e.g. Java version, checkstyle version, etc) amongst our Opower-managed projects.

This commit defers version management of its maven plugins up to opower-parent and removes now-redundant pom sections that our parent controls.

In the act of deferring our checkstyle version up to pose-parent, we're affecting an upgrade that removes the support for the DoubleCheckLocking check, so that's been removed from jpile's checkstyle.xml
Updating release_notes.txt with message about moving under the opower-parent pom
Merge pull request #26 from tvaughan77/master

Brings JPile under the opower-parent umbrella of maven plugin management
[maven-release-plugin] prepare release 1.7.5
[maven-release-plugin] prepare for next development iteration