Turns out Helm implements go template function ``base`` that will return
last component of a path. Instead of doing that manually in _funcs.tpl,
we can leverage the builtin. This commit replaces that.
Change-Id: I1b0c90e82790de405730b61ee85654a8810d6907
* Rename common chart to helm-toolkit
* Update useage of helpers to include reference to chart they come from.
* Update helm-toolkit function naming
Also catches several functions missed in previous PS
* Update remaining requirements.yaml to use helm-toolbox
* Dep Check container fix for common -> helm-toolbox renaming