[maven-release-plugin] prepare release 1.2.4
[maven-release-plugin] prepare for next development iteration
RE-1510 setting parent to oss-parent and removing the repository section (this'll require people set up the sonatype repositories in their local settings and/or rely on nexus.va.opower.it to proxy it)
RE-1510 Setting up opower-parent to be hosted in sonatype's public repo.  Enabling GPG signing and sonatype-specific server/profile rules in a profile that we can use when releasing open source code.