Maven project to change the warehouse location and image maven

1. Change the warehouse location

2, change the mirror

The wall cracked the proposed change, otherwise easily lead to the introduction of dependent failure, even if the Internet can science is still very slow. note:如果更改镜像之后，导致无法导入依赖，再更改回去即可。

<mirror>
	<id>nexus-aliyun</id>
	<mirrorOf>*</mirrorOf>
	<name>Nexus aliyun</name>
	<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>