Switch from Contributor License Agreement (CLA) to Developer Certificate of Origin (DCO) (#18)

Author: PatrikSteuer

CONTRIBUTING.md

@@ -26,7 +26,7 @@ There are three important things to know:
 This a checklist of things to keep in your mind when opening pull requests for this project.
 
 0. Before pushing anything, validate your pull request with `go test`
-1. Make sure you have signed the [Contributor License Agreement](#contributor-license-agreement)
+1. Make sure you have accepted the [Developer Certificate of Origin](#developer-certificate-of-origin-dco)
 2. Make sure any added dependency is licensed under Apache v2.0 license
 3. Strive for very high unit-test coverage and favor testing productive code over mocks
    (mock in depth wherever possible)
@@ -35,29 +35,9 @@ This a checklist of things to keep in your mind when opening pull requests for t
 Pull requests will be tested and validated by maintainers. In case small changes are needed (e.g., correcting typos), the maintainers may fix those issues themselves.
 In case of larger issues, you may be asked to apply modifications to your changes before the Pull Request can be merged.
 
-### Contributor License Agreement
+### Developer Certificate of Origin (DCO)
 
-When you contribute (code, documentation, or anything else), you have to be aware that your contribution is covered by the same [Apache 2.0 License](http://www.apache.org/licenses/LICENSE-2.0) that is applied to the Cloud Foundry CLI Java Plugin itself.
-Also, you need to agree to the Individual Contributor License Agreement, which can be [found here](https://gist.github.com/CLAassistant/bd1ea8ec8aa0357414e8).
-(This applies to all contributors, including those contributing on behalf of a company).
-If you agree to its content, you simply have to click on the link posted by the CLA assistant as a comment to the pull request.
-Click it to check the CLA, then accept it on the following screen if you agree to it.
-CLA assistant will save this decision for upcoming contributions and will notify you if there is any change to the CLA in the meantime.
-
-#### Company Contributors
-
-If employees of a company contribute code, in **addition** to the individual agreement above, there needs to be one company agreement submitted.
-This is mainly for the protection of the contributing employees.
-
-A company representative authorized to do so needs to download, fill, and print
-the [Corporate Contributor License Agreement](docs/SAP%20Corporate%20Contributor%20License%20Agreement.pdf) form. Then either:
-
--   Scan it and e-mail it to [opensource@sap.com](mailto:opensource@sap.com)
--   Fax it to: +49 6227 78-45813
--   Send it by traditional letter to: *Industry Standards & Open Source Team, Dietmar-Hopp-Allee 16, 69190 Walldorf, Germany*
-
-The form contains a list of employees who are authorized to contribute on behalf of your company.
-When this list changes, please let us know.
+Due to legal reasons, contributors will be asked to accept a DCO before they submit the first pull request to this projects, this happens in an automated fashion during the submission process. SAP uses [the standard DCO text of the Linux Foundation](https://developercertificate.org/).
 
 ## Code of Conduct