A minor code cleanup

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
[JENKINS-21428] - Renamed BatchCommandInstaller according to prevent confusions

Related to: https://issues.jenkins-ci.org/browse/JENKINS-21428

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
The next version will be 0.3

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
[maven-release-plugin] prepare release extra-tool-installers-0.3
Merge branch 'master' of https://github.com/jenkinsci/extra-tool-installers-plugin
[maven-release-plugin] prepare for next development iteration