Fix docker-compose installation
Fix docker-compose installation

The current pipeline was resulting in:

```
Collecting bcrypt>=3.1.3 (from paramiko>=2.4.2; extra == "ssh"->docker[ssh]<4.0,>=3.7.0->docker-compose==1.24.1)
  Downloading https://files.pythonhosted.org/packages/d8/ba/21c475ead997ee21502d30f76fd93ad8d5858d19a3fad7cd153de698c4dd/bcrypt-3.2.0.tar.gz (42kB)
    Complete output from command python setup.py egg_info:
    unable to execute 'x86_64-linux-gnu-gcc': No such file or directory
    unable to execute 'x86_64-linux-gnu-gcc': No such file or directory

        No working compiler found, or bogus compiler options passed to
        the compiler from Python's standard "distutils" module.  See
        the error messages above.  Likely, the problem is not related
        to CFFI but generic to the setup.py of any Python package that
        tries to compile C code.  (Hints: on OS/X 10.8, for errors about
        -mno-fused-madd see http://stackoverflow.com/questions/22313407/
        Otherwise, see https://wiki.python.org/moin/CompLangPython or
        the IRC channel #python on irc.freenode.net.)

        Trying to continue anyway.  If you are trying to install CFFI from
        a build done in a different context, you can ignore this warning.

    unable to execute 'x86_64-linux-gnu-gcc': No such file or directory
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-anJg1z/bcrypt/setup.py", line 76, in <module>
        cmdclass={"test": PyTest},
```

zalando/nakadi,zalando/nakadi