Code refactoring

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>
Merge branch 'master' of https://github.com/jenkinsci/customtools-plugin

Conflicts:
	src/main/java/com/synopsys/arc/jenkinsci/plugins/customtools/versions/ToolVersionParameterDefinition.java

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>