参考文章：
http://blog.csdn.net/oopsoom/article/details/41318599
[error] (marathon/*:assembly) deduplicate:different file contents found in the following:
[error] META-INF/aop.xml
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/kamon/kamon-core_2.11/0.6.7/kamon-core_2.11-0.6.7.jar:META-INF/aop.xml
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/kamon/kamon-scala_2.11/0.6.7/kamon-scala_2.11-0.6.7.jar:META-INF/aop.xml
[error] deduplicate: different filecontents found in the following:
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-handler/4.0.43.Final/netty-handler-4.0.43.Final.jar:META-INF/io.netty.versions.properties
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-common/4.0.43.Final/netty-common-4.0.43.Final.jar:META-INF/io.netty.versions.properties
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-buffer/4.0.43.Final/netty-buffer-4.0.43.Final.jar:META-INF/io.netty.versions.properties
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-codec-http/4.0.43.Final/netty-codec-http-4.0.43.Final.jar:META-INF/io.netty.versions.properties
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-transport/4.0.43.Final/netty-transport-4.0.43.Final.jar:META-INF/io.netty.versions.properties
[error]/root/.coursier/cache/v1/https/repo1.maven.org/maven2/io/netty/netty-codec/4.0.43.Final/netty-codec-4.0.43.Final.jar:META-INF/io.netty.versions.properties
红色部分是冲突文件
解决措施：
在marathon源码的根目录下
在build.sbt文件或者assembly.sbt文件里添加以下内容：
根据上面报的异常，因此，这里添加了两项内容。
然后，重新运行
#sbt clean compile assembly
在运行过程中，会抛一个警告：
不建议使用mergeStrategy关键字了
最终打包成功：
