* * Initial upgrade support
* - Detect from reconcile loop that it is uograde flow
* - Set ObeservedVersion to target when upgrade is finished
* - Delete unused objects at the end of upgrade
* * opertor controller unit test - detect upgrade
* cdi upgrade unit tests
* - verify upgrade flow is detected when version is updated
* - verify on upgrade objects are updated
* - verify on upgrade unused objects are deleted
* * optimize cleanuoUnusedResourses function
* fix logging error
* * CR fixes
* remove unused methods in unit tests
* use reflect.DeepEqual to compare runtime.Objects in unit test
* check DeletionTimeStamp before entering upgrade
* * uit tests - CR is deleted during/before upgrade
* * CR fixes:
* - invoke Deletion callbacks before and after resource deletion on clenaupUnusedResourse function
* - when looking for object to delete - search not only by name but by namespace as well
* * delete unused resources of previous version is CDI CRF is marked for deletion during upgrade
* add unit test for this case
* * should not start upgrade if versions are identical
* * add unit tests to verify there is no upgrade on identical versions
* CR fix - return error
* don't think we have to explicitly cleanup old resources when CDI deleted during upgrade
* refactor code and properly handle deleting resources on upgrade
* reconcile loop now does three way merge to better handle upgrade
