* Remove the usage of prometheus operator and manage prometheus instances ourselves. This is needed because prometheus operator doesn't work with kubernetes 1.10 yet and we need that support. We are not making use of prometheus operator capabilities yet, so there is no functionality lost.
* Add OWNERS files to monitoring related folders.
Fixes#578 and #493
* Added a document titled "Investigating Performance Issues" - this document will guide users through debugging application performance issues and will show how they can use the observability features offered by Elafros to identify such issues.
* Added metrics and a dashboard for autoscaler component and documented how it is used in the guide above.
Mustafa Demirhan
yanweiguo