fixes for harcoding as while using lets-encrypt option of having cont…

[librannk]

…rol over the name of certificates helps

[mlbiam]

I was about to merge this into the new helm charts, but the more i think about it why is this needed? If you're using Let's Encrypt via either an annotation on the Ingress or by manually creating a Certificate object you can have the resulting secret named unison-tls. What benefit is there of adding a new configuration option? Can you explain your usecase?

Thanks