Fix Bug 2086 Updating VNF status configurable

This fix allows to set REFRESH_ACTIVE period as config option which
periodically checks the VM status from VIM. Env variable can be set in the
ro container export OSMRO_PERIOD_REFRESH_ACTIVE=-1 to disable VM status updates.
This config parameter allowed to set >= 60 seconds or -1. Giving execute permission
stage-releasenote.sh file.

Change-Id: I9e0ed82830ca09532f87f76480003f278aac51ea
Signed-off-by: aticig <gulsum.atici@canonical.com>