[maven-release-plugin] prepare release v0.2.1
[maven-release-plugin] prepare release v0.2.1

cloudera/sshj,joprsal/sshj,bluekeyes/sshj,Boris-de/sshj,hierynomus/sshj,Juraldinio/sshj,juddgaddie/sshj,hierynomus/sshj