Fix RHEL 9.x family OS custom image deployments

[alanbach]

I received reports where RHEL 9.3 deployments are failing to boot, and after performing some troubleshooting, it turned out the sed command in the kickstart file was not working properly.

I applied a small fix and build RHEL 8.8 and RHEL 9.3 images and deployed using my MAAS 3.3.5. The deployments are now working properly, hence I'm proposing this PR.

diff --git a/centos7/http/centos7.ks.in b/centos7/http/centos7.ks.in
index 8c61879..47083a3 100644
--- a/centos7/http/centos7.ks.in
+++ b/centos7/http/centos7.ks.in
@@ -40,7 +40,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 yum clean all
 %end
diff --git a/centos8-stream/http/centos8-stream.ks.in b/centos8-stream/http/centos8-stream.ks.in
index 42990f6..823e78b 100644
--- a/centos8-stream/http/centos8-stream.ks.in
+++ b/centos8-stream/http/centos8-stream.ks.in
@@ -40,7 +40,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 dnf clean all
 %end
diff --git a/centos8/http/centos8.ks.in b/centos8/http/centos8.ks.in
index f7d2c82..8080061 100644
--- a/centos8/http/centos8.ks.in
+++ b/centos8/http/centos8.ks.in
@@ -40,7 +40,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 dnf clean all
 %end
diff --git a/rhel7/http/rhel7.ks.in b/rhel7/http/rhel7.ks.in
index 695fe26..f011496 100644
--- a/rhel7/http/rhel7.ks.in
+++ b/rhel7/http/rhel7.ks.in
@@ -40,7 +40,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 yum clean all
 %end
diff --git a/rhel8/http/rhel8.ks.in b/rhel8/http/rhel8.ks.in
index 9ee3846..caa543d 100644
--- a/rhel8/http/rhel8.ks.in
+++ b/rhel8/http/rhel8.ks.in
@@ -39,7 +39,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 dnf clean all
 %end
diff --git a/rhel9/http/rhel9.ks.in b/rhel9/http/rhel9.ks.in
index 9ee3846..5fddeed 100644
--- a/rhel9/http/rhel9.ks.in
+++ b/rhel9/http/rhel9.ks.in
@@ -39,7 +39,7 @@ rm -f /etc/sysconfig/network-scripts/ifcfg-[^lo]*
 sed -i 's/^GRUB_TERMINAL=.*/GRUB_TERMINAL_OUTPUT="console"/g' /etc/default/grub
 sed -i '/GRUB_SERIAL_COMMAND="serial"/d' /etc/default/grub
 sed -ri 's/(GRUB_CMDLINE_LINUX=".*)\s+console=ttyS0(.*")/\1\2/' /etc/default/grub
-sed -i 's/"GRUB_ENABLE_BLSCFG=.*"/"GRUB_ENABLE_BLSCFG=false"/g' /etc/default/grub 
+sed -i 's/GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/g' /etc/default/grub
 
 dnf clean all
 %end