Add sysinv-dbsync output to log message

This commit adds the stdout+stderr from sysinv-dbsync command
to the error log message if an exception occurs in this step
during 'deploy start' to help troubleshooting sysinv database
migration issues.

Test Plan
PASS: run deploy start successfully
PASS: force failure sysinv-dbsync verify message is logged

Story: 2010676
Task: 51301

Change-Id: I0349515d871948a2a23da57d7a236ad9a5071196
Signed-off-by: Heitor Matsui <heitorvieira.matsui@windriver.com>

software/software/utilities/migrate.py

@@ -570,15 +570,14 @@ def migrate_sysinv_database():
 
     sysinv_cmd = 'sysinv-dbsync'
     try:
-        print("Migrating sysinv")
         LOG.info("Executing migrate command: %s" % sysinv_cmd)
-        subprocess.check_call(sysinv_cmd,
-                              shell=True, stdout=sout, stderr=sout)
+        subprocess.run(sysinv_cmd, shell=True, check=True, text=True,
+                       stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 
     except subprocess.CalledProcessError as ex:
         LOG.exception("Failed to execute command: '%s' during upgrade "
-                      "processing, return code: %d"
-                      % (sysinv_cmd, ex.returncode))
+                      "processing, return code: %d, output: %s"
+                      % (sysinv_cmd, ex.returncode, ex.stdout))
         raise