Fixed determine/process reboot-cause service dependency (#17462)

Signed-off-by: anamehra <anamehra@cisco.com>

src/sonic-host-services-data/debian/sonic-host-services-data.determine-reboot-cause.service

@@ -1,7 +1,8 @@
 [Unit]
 Description=Reboot cause determination service
-Requires=rc-local.service database.service
-After=rc-local.service database.service
+Requires=rc-local.service
+After=rc-local.service
+Wants=process-reboot-cause.service
 
 [Service]
 Type=oneshot

src/sonic-host-services-data/debian/sonic-host-services-data.process-reboot-cause.service

@@ -1,8 +1,16 @@
 [Unit]
 Description=Retrieve the reboot cause from the history files and save them to StateDB
-Requires=database.service determine-reboot-cause.service
+PartOf=database.service
 After=database.service determine-reboot-cause.service
 
 [Service]
 Type=simple
+ExecStartPre=/usr/bin/systemctl is-active database
+ExecStartPre=/usr/bin/systemctl is-active determine-reboot-cause
+Restart=on-failure
+RestartSec=30
+RemainAfterExit=yes
 ExecStart=/usr/local/bin/process-reboot-cause
+
+[Install]
+WantedBy=multi-user.target