[maven-release-plugin] prepare release helix-0.6.2-incubating
Revert "[maven-release-plugin] prepare release helix-0.6.2-incubating"

This reverts commit 70872576f6804524884d916fab4500b43567b3c5.
[maven-release-plugin] prepare release helix-0.6.2-incubating
[maven-release-plugin] prepare for next development iteration