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

This reverts commit 633b6ba232678bcc5ec6723a55b8e2642530991c.
Revert "Revert "[maven-release-plugin] prepare for next development iteration""

This reverts commit 1c5b87470d5a20426f488523415e86fbbd3b9196.
Revert "[maven-release-plugin] prepare release smpp-0.7.0"

This reverts commit 5e018adf5bb046dae9cc5373909044320699c4c1.

Conflicts:
	pom.xml