FEATURE: General-purpose RIC platform initContainer image

FEATURE: General-purpose RIC platform initContainer image

This change adds a docker image intended for use as an initContainer
for RIC platform components.  The container is intended to have only
those components required for preconfiguration of RIC platform
element pods and two shell scripts:

/ricplt-init.sh is the script which should implement pod initialization

It is assumed that individual RIC component charts will overlay
/ricplt-init.sh with a component-specific initialization script.

Signed-off-by: dave kormann <dk3239@att.com>
Change-Id: Ib927ce8bd34b747e85ee431ae3211cefefd70308