Rename cronjob from delete-es-job to purge-es-job

[d3c3mber]

There's no existing/similar bug report.

• I have searched the existing issues

Describe the bug:

Rename the cronjob as delete is not a proper word

Expected behavior:

N/A

Additional

No response

Lunettes version

No response

Kubernetes version

No response

[ponsAoki]

@d3c3mber
Nice to meet you!
I am thinking of creating a Pull Request to resolve this issue.
Can you tell me how to sign the CLA?

[d3c3mber]

Hi @ponsAoki, thanks very much for reaching out.
Please free feel to open an PR for this issue.

For lunettes, we don't request a CLA, we are using DCO (Developer Certificate of Origin) , contributors are required to sign off that they adhere to those requirements by adding a Signed-off-by line to the commit messages. Git has provided a -s command line option to append that automatically to your commit messages, please use it when you commit your changes.

$ git commit -s -m 'This is my commit message'