Show return code, stdout, and stderr from shell commands

SystemUtilDebugSnippet.java

// Add the "LPT" section to this method (or similarly for other the other run...() methods in this class).
// Existing code as of 17-Jan-2017 from eucalyptus/clc/modules/core/src/main/java/edu/ucsb/eucalyptus/util/SystemUtil.java

//...
	public static int runAndGetCode(String[] command) {
    boolean hasTicket = maybeRestrictedOp( command );
		try
		{
			String commandString = "";
			for(String part : command) {
				commandString += part + " ";
			}
			LOG.debug("Running command: " + commandString);
			Runtime rt = Runtime.getRuntime();
			Process proc = rt.exec(command);
			StreamConsumer error = new StreamConsumer(proc.getErrorStream());
			StreamConsumer output = new StreamConsumer(proc.getInputStream());
			error.start();
			output.start();
			int returnValue = proc.waitFor();
			//LPT added for debug
			error.join();
			output.join();
			LOG.debug("Command return code = " + returnValue + "\n    output = '" + output.getReturnValue() +
			    "'\n    error = '" + error.getReturnValue() + "'");
			//LPT end of added debug code
			return returnValue;
		} catch (Exception t) {
			LOG.error(t, t);
		} finally {
      if ( hasTicket ) releaseRestrictedOp( command );
    }
		return -1;
	}
//...