Add support for Helm v3, chartmuseum, and armada chart

This adds support for Helm v3:
- 'helm init' and 'helm serv' were removed in v3, and helm
  initialization was simplified so that is not required in build.
- chart validation and version checking is enforced with 'helm lint',
  so all Charts require the tag: apiVersion: v1 (or v2).
- 'chartmuseum' is a drop-in replacement for 'helm serv', and is
  currently used for building charts only. It is not part of ISO
  image.
- armada chart is built and installed to /opt/extracharts. This
  provides a Kubernetes pod with armada-api and tiller containers.

This provides a Helm v2 client (i.e., helmv2-cli) that gives access
to containerized armada/tiller managed charts. This can be used as
an interactive shell, or as a wrapper for single helm v2 commands.

Change-Id: Iff2b219ea765cf9278c6e80c6aeb5b98cc9a0626
Depends-On: https://review.opendev.org/732731
Story: 2007000
Task: 38893
Signed-off-by: Jim Gauld <james.gauld@windriver.com>

kubernetes/chartmuseum/centos/build_srpm.data

@@ -0,0 +1,6 @@
+VERSION=0.12.0
+TAR_NAME=chartmuseum
+TAR="$TAR_NAME-$VERSION.tar.gz"
+COPY_LIST="${CGCS_BASE}/downloads/$TAR $STX_BASE/downloads/chartmuseum-v0.12.0-amd64"
+
+TIS_PATCH_VER=1

kubernetes/chartmuseum/centos/chartmuseum.spec

@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2020 Wind River Systems, Inc.
+#
+%global with_debug 0
+
+%if 0%{?with_debug}
+%global _dwz_low_mem_die_limit 0
+%else
+%global debug_package   %{nil}
+%endif
+
+Name: chartmuseum
+Version: 0.12.0
+Release: %{tis_patch_ver}%{?_tis_dist}
+Summary: Helm Chart Repository with support for Amazon S3 and Google Cloud Storage
+Group: Kubernetes
+License: Apache-2.0
+Source0: %{name}-%{version}.tar.gz
+Source1: chartmuseum-v0.12.0-amd64
+Packager: Wind River <info@windriver.com>
+URL: https://github.com/helm/chartmuseum
+#URL: https://s3.amazonaws.com/chartmuseum
+
+BuildRequires: pkgconfig(systemd)
+BuildRequires: pkgconfig(libseccomp)
+BuildRequires: pkgconfig(libsystemd-journal)
+BuildRequires: golang >= 1.10.0
+BuildRequires: rsync
+BuildRequires: go-md2man
+BuildRequires: go-bindata
+BuildRequires: rpm-devel >= 4.14.0
+BuildRequires: rpm-libs >= 4.14.0
+
+Requires: /bin/bash
+
+%define CHARTMUSEUM_DIR ${HOME}/src/github.com/helm/%{name}
+
+%description
+%{summary}
+
+%prep
+%setup -q -c -n %{name}
+
+%build
+# NOTE: chartmuseum is only used to build helm charts, and is not
+# part of the ISO.
+# Gather the licence and readme from the source tarball.
+mkdir -v -p %{CHARTMUSEUM_DIR}
+mv -v %{name}/* %{CHARTMUSEUM_DIR}/
+mv -v %{CHARTMUSEUM_DIR}/{LICENSE,README.md} %{name}/
+pushd %{CHARTMUSEUM_DIR}
+# Stub out the make to build golang package; we are using a binary.
+#make
+popd
+
+%install
+install -d %{buildroot}%{_bindir}
+install -m 755 %{SOURCE1} %{buildroot}%{_bindir}/chartmuseum
+
+%files
+%defattr(-,root,root,-)
+%doc %{name}/README.md
+%license %{name}/LICENSE
+%{_bindir}/chartmuseum
+
+%changelog