Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit df6844474c8c104c219cc7c3a359ca124bf4747f.
Revert "[maven-release-plugin] prepare release jclouds-1.6.2-incubating-rc0"

This reverts commit 61baf2ada24858f49328db301b57f4e09702cc5e.