Commits on Mar 18, 2016

1. Apply shared checkstyles to all samples. …

   We use [subtree
   merging](https://git-scm.com/book/en/v1/Git-Tools-Subtree-Merging) to
   pull these from the
   [java-repo-tools](https://github.com/GoogleCloudPlatform/java-repo-tool) repository.
   
   I ran the following commands:
   
   ```
   git remote add java-repo-tools
   git@github.com:GoogleCloudPlatform/java-repo-tools.git
   git fetch java-repo-tools master
   git checkout -b java-repo-tools java-repo-tools/master
   git checkout master
   git checkout -b use-java-repo-tools
   git read-tree --prefix=java-repo-tools/ -u java-repo-tools
   ```
   
   and then updated the main POM to use the one from `java-repo-tools`.

   

   tswast committed Mar 18, 2016
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