ensure tgtd is running in debug mode

this change enables on-the-fly tgtd debug before starting cinder

Change-Id: I193bfd77c5a82e8347d75e2a7fe670a6e25f5558
diff --git a/lib/cinder b/lib/cinder
index bec65ed..ccf38b4 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -496,6 +496,8 @@
             # name, and would need to be adjusted too
             exit_distro_not_supported "restarting tgt"
         fi
+        # NOTE(gfidente): ensure tgtd is running in debug mode
+        sudo tgtadm --mode system --op update --name debug --value on
     fi
 
     screen_it c-api "cd $CINDER_DIR && $CINDER_BIN_DIR/cinder-api --config-file $CINDER_CONF"