In order to allow uniqueness across helm applications, rename the
psp-rolebinding helm chart to portieris-psp-rolebinding
Also fix up issue with loading psp-rolebinding helm plugin.
Related-bug: 1889019
Story: 2007348
Task: 40430
Change-Id: Ic113732d93d93c6cd154ddc4660ba15f5424c737
Signed-off-by: Joseph Richard <joseph.richard@windriver.com>