private TarArchiveOutputStream createTarArchiveStream(File packageFile) throws IOException {
		FileOutputStream fos = new FileOutputStream(packageFile);
		return new TarArchiveOutputStream(new BufferedOutputStream(fos));
	}
Create agent package.

@param packageDownloadInfo information for downloading agent.

@return File  agent package.
ngrinder-controller/src/main/java/org/ngrinder/agent/service/AgentPackageService.java