More accurately recreate the environment a user would be building in.

We should be testing our distfiles against our current version of
`install-required-packages.sh`, not some pre-generated test image that
we have to manage ina separaterepo.

Also, disable telemetry for the test build so we don't accidentally
pollute the stats.

.github/scripts/run_install_with_dist_file.sh

@@ -19,6 +19,7 @@ shift
 printf >&2 "Opening dist archive %s ... " "${distfile}"
 tar -xovf "${distfile}"
 distdir="$(echo "${distfile}" | cut -d. -f1,2,3)"
+cp -a packaging/installer/install-required-packages.sh "${distdir}/install-required-packages.sh"
 if [ ! -d "${distdir}" ]; then
   printf >&2 "ERROR: %s is not a directory" "${distdir}"
   exit 2
@@ -30,8 +31,8 @@ pushd "${distdir}" || exit 1
 docker run \
   -v "${PWD}:/netdata" \
   -w /netdata \
-  "netdata/os-test:centos7" \
-  /bin/bash -c "./netdata-installer.sh --dont-wait --require-cloud --install /tmp && echo \"Validating netdata instance is running\" && wget -O - 'http://127.0.0.1:19999/api/v1/info' | grep version"
+  "ubuntu:latest" \
+  /bin/bash -c "./install-required-packages.sh --dont-wait --non-interactive netdata && ./netdata-installer.sh --dont-wait --require-cloud --disable-telemetry --install /tmp && echo \"Validating netdata instance is running\" && wget -O - 'http://127.0.0.1:19999/api/v1/info' | grep version"
 popd || exit 1
 
 echo "All Done!"