Feature keystore

[mirkenstein]

See the README_KEYSTORE_SSL.md file.
This pull request adds support for uploading SSL Certificate Authority files for the output Elasticsearch Cluster and the monitored cluster.
Adds support for beats keystore secrets.

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[cla-checker-service]

❌ Author of the following commits did not sign a Contributor Agreement:
, , 15a858c, , , ,

Please, read and sign the above mentioned agreement if you want to contribute to this project

[mirkenstein]

Typo correction SLL->SSL
15a858c

[mirkenstein]

I Approve

[mirkenstein]

Already signed the contributor agreement.

[jmlrt]

jenkins test this please

[jmlrt]

cla/check

[jmlrt]

cla/check

[jmlrt]

jenkins test this please

[cutler-scott-newrelic]

Seems like the CLA checker is broken? I'm still hoping to see this merged eventually as well! I got an email saying this was stale, hopefully it dosen't get dropped.

[mirkenstein]

Can someone remove the extra file tasks/beats-ssl . This file already exists as tasks/beats-ssl.yml