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

This reverts commit 4697079b115eed01f9eede1843d078ec56ae72cf.
Revert "[maven-release-plugin] prepare release wso2-axis2-1.6.1-wso2v11-rc1"

This reverts commit 82cd3dc79dc395b2d113826e1e92c9b91f0bb55c.