Support enroll-init retry

In the event of an enroll-init failure (e.g., standalone node reconfig
failure), a retry without reinstallation must be supported to allow
users to simply try again with updated config values.

Overall, this requires the cloud-init services to remain enabled,
such that cloud config can be re-applied and enroll-init scripts can re-run.

Story: 2011100
Task: 50662

Test Plan:
1. PASS: Validate cloud-init services:
   - Verify cloud-init remains enabled until enroll reconfig
     succeeds
   - Verify cloud-init services are fully disabled after a
     successful enroll reconfig

2. PASS: Ensure enroll-init-reconfig script can be triggered via
   cloud-init multiple times until success

3. PASS: Validate that enroll-init can be redone
        after successive failures:
   - Initiate enroll-init with bad parametere such that the
     enroll-init-reconfig script fails
   - Verify enroll-init success with corrected parameters
   - Verify error/success msgs on for each enroll-init attempt

Change-Id: I87f32b89255d84af381642cf7f9920169cb6b5d1
Signed-off-by: Salman Rana <salman.rana@windriver.com>

utilities/platform-util/scripts/enroll-init-cleanup

@@ -7,8 +7,10 @@
 # script to cleanup the cloud-init services
 #
 
-touch /etc/cloud/cloud-init.disabled
-rm -f /etc/systemd/system-preset/20-cloud-init.preset
+if [ -f "/var/lib/factory-install/state/enroll-init" ]; then
+    touch /etc/cloud/cloud-init.disabled
+    rm -f /etc/systemd/system-preset/20-cloud-init.preset
 
-systemctl daemon-reload
-systemctl preset-all
+    systemctl daemon-reload
+    systemctl preset-all
+fi

utilities/platform-util/scripts/enroll-init-reconfigure

@@ -246,4 +246,6 @@ check_services_status
 reconfigure_OAM
 reconfigure_password
 
+touch /var/lib/factory-install/state/enroll-init
+
 log_info "Successfully reconfigured OAM network and system password."