Configure and start a preconfigured ECU-TEST installation.

Pipeline usage
Signatures:
startET(String toolName) : void
            
startET(String toolName, String workspaceDir, String settingsDir, int timeout,
        boolean debug, boolean keepInstance, boolean updateUserLibs) : void
            
ETInstance.start(String toolName) : void
            
ETInstance.start(String toolName, String workspaceDir, String settingsDir, int timeout,
         boolean debug, boolean keepInstance, boolean updateUserLibs) : void
            
Examples:
startET('ECU-TEST')
            
def instance = ET.installation('ECU-TEST')
startET installation: instance.installation, workspaceDir: 'C:\\Data'
            
def instance = ET.newInstallation('ECU-TEST', 'C:\\Program Files\\ECU-TEST 8.0')
instance.start()