Check for systemd before installing systemd specific files

https://bugzilla.redhat.com/show_bug.cgi?id=1282010

dracut.sh

@@ -1481,6 +1481,7 @@ if [[ $kernel_only != yes ]]; then
         cat "$f" >> "${initdir}/etc/fstab"
     done
 
+    if dracut_module_included "systemd"; then
         if [ -d ${initdir}/$systemdutildir ]; then
             mkdir -p ${initdir}/etc/conf.d
             {
@@ -1489,6 +1490,7 @@ if [[ $kernel_only != yes ]]; then
                 printf "%s\n" "systemdsystemconfdir=\"$systemdsystemconfdir\""
             } > ${initdir}/etc/conf.d/systemd.conf
         fi
+    fi
 
     if [[ $DRACUT_RESOLVE_LAZY ]] && [[ $DRACUT_INSTALL ]]; then
         dinfo "*** Resolving executable dependencies ***"

modules.d/90crypt/module-setup.sh

@@ -86,6 +86,7 @@ install() {
 
     inst_simple "$moddir/crypt-lib.sh" "/lib/dracut-crypt-lib.sh"
 
+    if dracut_module_included "systemd"; then
         inst_multiple -o \
                       $systemdutildir/system-generators/systemd-cryptsetup-generator \
                       $systemdutildir/systemd-cryptsetup \
@@ -95,5 +96,7 @@ install() {
                       $systemdsystemunitdir/sysinit.target.wants/cryptsetup.target \
                       systemd-ask-password systemd-tty-ask-password-agent
         inst_script "$moddir"/crypt-run-generator.sh /sbin/crypt-run-generator
+    fi
+
     dracut_need_initqueue
 }

modules.d/95udev-rules/module-setup.sh

@@ -56,8 +56,10 @@ install() {
     # eudev rules
     inst_rules 80-drivers-modprobe.rules
 
+    if dracut_module_included "systemd"; then
         inst_multiple -o ${systemdutildir}/network/*.link
         [[ $hostonly ]] && inst_multiple -H -o /etc/systemd/network/*.link
+    fi
 
     {
         for i in cdrom tape dialout floppy; do