Change a user's password remotely

void changePassword(User admin, String username, String password)
throws RemoteException, RemoteValidationException, RemotePermissionException;

public void changePassword(User admin, String username, String password)
  throws RemoteException, RemoteValidationException, RemotePermissionException {
        if (!permissionManager.hasPermission(Permissions.ADMINISTER, admin))
        {
            throw new RemotePermissionException("You do not have permission to administer a user.");
        }
        if (username == null || "".equals(username))
        {
            throw new RemoteValidationException("username needs a value");
        }
        if (password == null || "".equals(password))
        {
            throw new RemoteValidationException("password needs a value");
        }
        // IS THIS NECESSARY?  Copied from deleteUser()
        if (applicationProperties.getOption(APKeys.JIRA_OPTION_USER_EXTERNALMGT))
        {
            throw new RemotePermissionException("Cannot change password, as external user management is enabled.");
        }

        User user = null;
        try
        {
            user = userManager.getUser(username);
        }
        catch (EntityNotFoundException e)
        {
            throw new RemoteValidationException("Unable to find user  " + username);
        }
		
        try {
            UserUtils.changePassword(user, password);
        } catch (ImmutableException e) {
            throw new RemoteException("Unable to change password for " + user + ": " + e.getMessage(), e);
        }
}