test/cases: new case that verifies composer works behind satellite

Introduce a test case where 2 httpd proxies are used to simulate custom
repos with custom subscriptions. That is, every repo requires
client-side tls certificate with its own CA. Make sure both osbuild and
osbuild-composer can use these repositories by issuing an image build.

test/cases/regression.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 set -euo pipefail
 
+source /etc/os-release
+
 TESTS_PATH=/usr/libexec/tests/osbuild-composer/
 mkdir --parents /tmp/logs
 LOGS_DIRECTORY=$(mktemp --directory --tmpdir=/tmp/logs)
@@ -40,11 +42,26 @@ run_test_case () {
 # Provision the software under test.
 /usr/libexec/osbuild-composer-test/provision.sh
 
-# Run each test case.
+# Run test cases common for all distros.
 for TEST_CASE in "${TEST_CASES[@]}"; do
     run_test_case ${TESTS_PATH}/"$TEST_CASE"
 done
 
+case "${ID}" in
+    "fedora")
+        if [ "${VERSION_ID}" -eq "33" ];
+        then
+            # TODO: make this work for all fedora versions once we can drop the override from
+            # the Schutzfile. (osbuild CI doesn't build any Fedora except 33)
+            /usr/libexec/tests/osbuild-composer/regression-composer-works-behind-satellite.sh
+            run_test_case ${TESTS_PATH}/regression-composer-works-behind-satellite.sh
+        else
+            echo "No regression test cases specific to this Fedora version"
+        fi;;
+    *)
+        echo "no test cases specific to: ${ID}-${VERSION_ID}"
+esac
+
 # Print a report of the test results.
 test_divider
 echo "😃 Passed tests:" "${PASSED_TESTS[@]}"
@@ -59,3 +76,4 @@ else
     echo "🔥 One or more tests failed."
     exit 1
 fi
+