Add basic tier0 tests to verify that installing mod_proxy_cluster doesn't break httpd, and move the active conf file to a sample location

Related: #1964892

gating.yaml

@@ -0,0 +1,6 @@
+--- !Policy
+product_versions:
+  - rhel-9
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

mod_proxy_cluster.spec

@@ -27,7 +27,7 @@ License: 	LGPLv3
 Group: 		Applications/System
 URL:		http://www.jboss.org/
 Source0:        mod_cluster-%{commitid}.tar.gz
-Source1:        %{pkg_name}.conf
+Source1:        %{pkg_name}.conf.sample
 Source2:        %{pkg_name}.te
 Source3:        %{pkg_name}.fc
 
@@ -90,7 +90,7 @@ install -d -m 755 $RPM_BUILD_ROOT/%{_localstatedir}/cache/mod_cluster
 
 install -d -m 755 $RPM_BUILD_ROOT%{_sysconfdir}/httpd/conf.d/
 install -p -m 644 %{SOURCE1} \
-        $RPM_BUILD_ROOT%{_sysconfdir}/httpd/conf.d/mod_cluster.conf
+        $RPM_BUILD_ROOT%{_sysconfdir}/httpd/conf.d/mod_cluster.conf.sample
 
 %if %with zip
 install -d -m 755 $RPM_BUILD_ROOT%{_javadir}/jbossas-fordev
@@ -135,7 +135,7 @@ fi
 %doc lgpl.txt
 %dir %{_localstatedir}/cache/mod_cluster
 %attr(0755,root,root) %{aplibdir}/*
-%config(noreplace) %{_sysconfdir}/httpd/conf.d/mod_cluster.conf
+%{_sysconfdir}/httpd/conf.d/mod_cluster.conf.sample
 # for SELinux
 %dir %{_datadir}/selinux/packages/%{name}
 %{_datadir}/selinux/packages/%{name}/mod_cluster.pp

tests/test.yml

@@ -0,0 +1,18 @@
+- hosts: localhost
+  remote_user: root
+  tags:
+    - classic
+  roles:
+  - role: standard-test-basic
+    tests:
+    - verify_httpd_up:
+        dir: .
+        run: "curl http://localhost/ &> testfile.log || true && grep '<h1>Fedora Webserver <strong>Test Page</strong></h1>' testfile.log"
+    - check_error_log:
+        dir: .
+        run: "! sudo grep -i error /var/log/httpd/error_log | grep -v \"AH01276\""
+    required_packages:
+    - mod_proxy_cluster
+    - httpd
+    required_services:
+    - httpd