fix: Make subscription-manager RPM protected on RHEL

* Card ID: RHEL-7172
* The dnf has concept of protected RPM packages. All
  protected packages should have configuration files in
  /etc/dnf/protected.d/ directory.
* Added simple configuration file containing subscription-manager
* Modified .spec file to install this file only on RHEL

Signed-off-by: Jiri Hnidek <jhnidek@redhat.com>

Author: jirihnidek

etc-conf/protected.d/subscription-manager.conf

@@ -0,0 +1 @@
+subscription-manager

subscription-manager.spec

@@ -347,6 +347,11 @@ make -f Makefile install VERSION=%{version}-%{release} \
     %{?subpackages} \
     %{?exclude_packages}
 
+%if 0%{?rhel}
+mkdir -p %{buildroot}%{_sysconfdir}/dnf/protected.d
+install -m 644 %{_builddir}/%{buildsubdir}/etc-conf/protected.d/subscription-manager.conf %{buildroot}%{_sysconfdir}/dnf/protected.d/subscription-manager.conf
+%endif
+
 %if %{use_dnf}
 pushd src/plugins/libdnf
 mkdir -p %{buildroot}%{_libdir}/libdnf/plugins
@@ -444,6 +449,10 @@ find %{buildroot} -name \*.py* -exec touch -r %{SOURCE0} '{}' \;
 
 %attr(644,root,root) %config(noreplace) %{_sysconfdir}/rhsm/rhsm.conf
 
+%if 0%{?rhel}
+%config(noreplace) %attr(644,root,root) %{_sysconfdir}/dnf/protected.d/subscription-manager.conf
+%endif
+
 %if %{use_dnf}
     %ghost %{_sysconfdir}/yum.repos.d/redhat.repo
 %endif