Merge topic 'static_variables_class'

8b58389c SystemTools: Move private ReplaceString method to SystemToolsStatic class
7512ab8c SystemTools: Move private FindIsFullPath method to SystemToolsStatic class
a1271fea SystemTools: Move private FindName method to SystemToolsStatic
d9db985f SystemTools: Move private GetEnvImpl method to SystemToolsStatic
9e32eecd SystemTools: Move private type definitions to SystemToolsStatic
67eb2674 SystemTools: Move SystemTools::TranslationMap to SystemToolsStatic
706919be SystemTools: Move SystemTools::PathCaseMap to SystemToolsStatic
7c273c83 SystemTools: Move SystemTools::EnvMap to SystemToolsStatic
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !134