Update distribution scripts to python3

Also use python3 packages in Dockerfiles.
Make python2 also available for OpenDaylight until they migrate

Signed-off-by: Miroslav Los <miroslav.los@pantheon.tech>
Issue-ID: CCSDK-1923
Change-Id: I3d4453ccbfe191c545ba574695387dd33c129e25
diff --git a/alpine/src/main/docker/Dockerfile b/alpine/src/main/docker/Dockerfile
index 6cbceaf..2e29c4d 100644
--- a/alpine/src/main/docker/Dockerfile
+++ b/alpine/src/main/docker/Dockerfile
@@ -1,4 +1,4 @@
-# Base ubuntu with added packages needed for open ecomp
+# Base alpine with added packages needed for open ecomp
 FROM alpine:3.8
 MAINTAINER CCSDK  Team (onap-ccsdk@lists.onap.org)
 
@@ -11,4 +11,4 @@
 ENV https_proxy ${HTTPS_PROXY}
 
 # Add tools needed for OpenDaylight
-RUN apk update && apk --no-cache add bash git openjdk8 maven mysql-client nodejs py-pip graphviz unzip rsync nss
+RUN apk update && apk --no-cache add bash git openjdk8 maven mysql-client nodejs python3 graphviz unzip rsync nss