[#289] Flag to tag timeouts as permanent failure

[yevgenys]

refactored SMSCShellExecutor:removed duplicates for CLI get command;
added new option to CLI get command;
added tests for CLI get command;
added new flag 'markTimeoutAsPermanentFailure' to SmscPropertiesManagement;
added functionality for new flag;
Fixes #289

reduced code in ShellExecutor;
added discovery of new getters via reflection:
no need to add manual call of getter method, getter will be discovered automatically

    private void initSmscPropertiesManagementGetters() {
        smscPropertiesManagementGetters = new HashMap<>();
        Class c = smscPropertiesManagement.getClass();
        for (Method method : c.getMethods()) {
            String methodName = method.getName();
            if (methodName.startsWith("get")) {
                smscPropertiesManagementGetters.put(methodName.substring(3).toLowerCase(), method);
            } else if (methodName.startsWith("is")) {
                smscPropertiesManagementGetters.put(methodName.substring(2).toLowerCase(), method);
            }
        }
    }

then just call function
addProperty(sb, "${getterNameWithout_get|is}");