在中文环境下通过python2.7调用exec_cmd.py安装软件包失败

### 问题描述
+ 内核版本: 4.19.90-2206.2.0.0154.vlx30.v99_2003.x86_64
+ OS 版本: LinxOS 6.0.99 EL20.03-SP3
+ 平台架构: x86_64
+ 相关日志:

```bash
Read Private Settings
    /opt/tone/etc/tonerc
Host gitee.com not found in /root/.ssh/known_hosts
Host ssh.github.com not found in /root/.ssh/known_hosts
libtirpc-devel not installed
Traceback (most recent call last):
  File "/usr/local/bin/tone", line 6, in <module>
    run()
  File "/opt/tone/core/tone.py", line 97, in run
    return worker.obj.run(config)
  File "/opt/tone/core/modules/cli/run/Subcommand.py", line 57, in run
    subcommand.run()
  File "/opt/tone/core/subcommandflow.py", line 24, in run
    dispatcher.map_method('run', self)
  File "/opt/tone/core/modulemanager.py", line 77, in map_method
    method(*argv)
  File "/opt/tone/core/modules/subcommand/run/Worker.py", line 19, in run
    testcmd.install()
  File "/opt/tone/core/utils/tests.py", line 356, in install
    self._run(command, halted_on_fail=True)
  File "/opt/tone/core/utils/tests.py", line 258, in _run
    self.result = executor.run()
  File "/opt/tone/core/utils/exec_cmd.py", line 168, in run
    self.save_log_by_type(True)
  File "/opt/tone/core/utils/exec_cmd.py", line 138, in save_log_by_type
    data = self.read_output(piptype)
  File "/opt/tone/core/utils/exec_cmd.py", line 213, in read_output
    raise BaseException("{}\n{}".format(e, traceback.format_exc()))
BaseException: 'ascii' codec can't encode character u'\u5e74' in position 51: ordinal not in range(128)
Traceback (most recent call last):
  File "/opt/tone/core/utils/exec_cmd.py", line 210, in read_output
    print(data,end='')
UnicodeEncodeError: 'ascii' codec can't encode character u'\u5e74' in position 51: ordinal not in range(128)
```

### 复现方法

#### 1 通过T-One Web创建一个Job

设置的环境变量如下：

```bash
TONE_PATH="/opt/tone"
LANG="zh_CN.UTF-8"
LC_ALL="zh_CN.UTF-8"
TONE_CLI_GIT_URL="git@172.23.45.60:linxos-test-platform/anolis/tone-cli.git"
GIT_URL="git@172.23.45.60:linxos-test-platform/anolis/ltp.git"
LTP_BRANCH="linxos-6.0.99-2003"
```

#### 2 登录到被测机器查看日志

```bash
root@VM161:/tmp# cat /tmp/tone_ltp_math.log 
```

#### 3 检查运行Job的Python解释器

```bash
root@VM161:/tmp# /usr/bin/env python
Python 2.7.18 (default, Dec 31 2021, 19:58:09) 
[GCC 7.3.0] on linux2
...<snip>...
```

运行Job调用的是`python 2.7.18`。

### 实际效果

在中文环境下，无法通过`python2.7`执行脚本命令安装`libtirpc-devel`。

### 期望效果

在中文环境下，通过`python2.7`执行脚本命令安装`libtirpc-devel`，安装成功。

anolis/tone-cli

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