Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (install) on project cloud-marvin: Command execution failed. Process exited with an error: 1 (Exit value: 1) -> [Help 1]下载了cloudstack的源码，并按照INSTALL.md的指引进行编译，结果报如上的错误，解决方法：
$ pip install mysql-connector-python (#marvin dependancy)
$ pip install requests (#reqd for marvin deploying the zone)原因就是marvin缺少了以来包，安装之后就可以了