[VOL-5257] Release patch repo:voltha-onos (branch=voltha-2.12)

app-install.sh
Dockerfile.voltha-onos
----------------------
  o Double update: backport fixes from branch=master
  o commit c066864d994b0e274cad20d37608bce4d15f368a
  o Docker: install command rsync.
  o app-install.sh: Fixed a typo in an array index used to obtain a filename.

Change-Id: Ibd005009af1700f912c2aca02635bb8cdbbe29c1
diff --git a/Dockerfile.voltha-onos b/Dockerfile.voltha-onos
index 0af83e2..9c64900 100644
--- a/Dockerfile.voltha-onos
+++ b/Dockerfile.voltha-onos
@@ -74,7 +74,15 @@
 RUN apt-get install --reinstall -y ca-certificates
 RUN rm /etc/apt/sources.list.d/zulu-openjdk.list
 RUN apt-get update
-RUN apt-get install unzip -y
+
+# ----------------------------------------------------
+# [TODO] Morph into a loop: install pkg; pkg --version
+# ----------------------------------------------------
+RUN apt-get install -y rsync
+RUN apt-get install -y unzip
+
+RUN rsync --version | head -n1
+RUN unzip --help    | head -n1
 
 RUN <<BANNER
     echo ""