Fix potential nil ptr seg fault and CI test issue

Fix potential nil ptr seg fault and CI test issue

This change corrects two problems that the "dockerless"
CI build process was encountering:
	- Include and link paths set in the CMake config
	  were not always honoured by the application test
	  scripts

	- Building packges to install in the test environment
	  as a non-root user was causing non-standard install
	  prefixes to be added to the packages.

This change also corrects a typo in the NNG module which
potentially could have allowed a nil pointer to be
dereferenced. This bug was discovered while makeing the
changes for the CI jobs.

Issue-ID: RIC-303

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Change-Id: I30150950dd186e72f8c822ec3fbe5b07369cb4ce