Store Elasticsearch master certs (ca and key) into secret

[pavolloffay]

We have to store ES master certs ca.crt, ca.key to a secret. These certs are needed to recreate client certs used by jaeger and curator.

The recreation of secrets happens on every loop. The script for creating the certs checks whether ca and key are present on operator's filesystem - if they are it uses them. The problem happens when the operator restarts - It will create new certs.

There is also other issue, we store certs in one directory at the moment so all instances get same ca and key certs.

The actions:

• store master certs in a secret per instance
• load master certs to filesystem before generating certs
• set working directory for cert generation script to something which includes namespace and jaeger instance name