0.5.1-rc0

Change Log

Made the cacheVolumeClaimTemplate optional(#385)
Segment store pvcs are not getting deleted even after pravega cluster deletion(#390)
helm3 supported script added(#386)
Fixing endtoend tests (#371)
Add helm 3 support, post-install hooks and make cluster specs overridable(#395)
Add certs overrides and improve chart resource metadata(#398)
Increase pravega-operator code coverage(#231)
Support for name override inside charts(#402)
Added Readiness check for controller(#404)
Documentation fix(#401)
Improved unit test coverage for controller and upgrade.go(#410)
Added fix for populating loglevel in controller(#412)
Added leader election (#372)
Adding support for helm upgrades(#388)
Changing default name of zookeeper service(#415)
Updating Pravega configuration key names(#411)
Added readiness check for auth and tls(#417)