Unfork should properly handle helm name prefixes

[laverya]

Helm will often add prefixes to the names of generated resources when applying to a cluster - resulting in names like jaunty-quail-redis-master instead of just redis-master. Unfork should handle this (with json patches to change names, if required) when it appears.

[laverya]

WIP over at https://github.com/laverya/unfork/tree/discover-and-correct-changes-in-unfork-resource-names but needs work