Seata1.6.1，ext/apm-seata-skywalking-plugin模块在最后编译，导致首次编译打包时distribution目录下无ext子目录

[HEIBAIJIE]

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

由于distribution模块不依赖ext/apm-seata-skywalking-plugin模块，导致distribution先于ext/apm-seata-skywalking-plugin构建。
这导致release-seata.xml中

的打包动作在首次构建时不会生效。
这将进一步导致Dockerfile中的这一行
ADD ext/ /seata-server/ext
在构建镜像时会报错。

这一bug在第二次构建时会消失，因为apm-seata-skywalking-plugin在上一次构建时已经打包完成了。

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

可以看到apm-seata-skywalking-plugin晚于distribution

Ⅲ. Describe what you expected to happen

预期是先构建apm-seata-skywalking-plugin再构建distribution

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. 下载1.6.1源码包。
2. 运行 mvn -Prelease-seata -Dmaven.test.skip=true clean install -U
3. 观察distribution/target/seata-server-1.6.1/seata，其中没有ext子目录

Ⅴ. Anything else we need to know?

建议distribution模块依赖apm-seata-skywalking-plugin模块

Ⅵ. Environment:

• JDK version : 1.8.0_272
• Seata version: 1.6.1
• OS : Windows10
• Others: maven 3.6.3

[slievrly]

@HEIBAIJIE Can you submit a pr to fix this issue ?

[HEIBAIJIE]

@slievrly I will submit a pr tonight.

[slievrly]

@slievrly I will submit a pr tonight.

thanks for your contribution.