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

This reverts commit 577c1d3417732b878d347769f10cc6066f6a3791.
Revert "[maven-release-plugin] prepare release maven-support-6.2-ee-sp1"

This reverts commit 297097da66192fa95eeb221ab8ae33091f95e452.
Revert "Prepare 6.2-ee-sp1 release."

This reverts commit a1ac6b7ae787ed307f6412bfdb1c040a20dd89a7.