YQ Connector:Use docker-compose in integrational tests

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+# Contributing to ANTLR 4
+
+1. [Fork](https://help.github.com/articles/fork-a-repo) the [antlr/antlr4 repo](https://github.com/antlr/antlr4), which will give you both key branches, `master` and `dev`
+2. Make sure to `git checkout dev` in your fork so that you are working from the latest development branch
+3. Create and work from a branch derived from `dev` such as `git checkout -b your-branch-name`
+4. Install and configure [EditorConfig](http://editorconfig.org/) so your text editor or IDE uses the ANTLR 4 coding style
+5. [Build ANTLR 4](doc/building-antlr.md)
+6. [Run the ANTLR project unit tests](doc/antlr-project-testing.md)
+7. Create a [pull request](https://help.github.com/articles/using-pull-requests/) with your changes and make sure you're comparing your `dev`-derived branch in your fork to the `dev` branch from the `antlr/antlr4` repo:
+
+<img src="doc/images/PR-on-dev.png" width="600">
+
+**Note:** Each commit requires a "signature", which is simple as using `-s` (not 
+`-S`) to the git commit command:
+
+```
+git commit -s -m 'This is my commit message'
+```
+
+Github's pull request process enforces the sig and gives instructions on how to 
+fix any commits that lack the sig. See [Github DCO app](https://github.com/apps/dco) 
+for more info.