LOGC-63: Strip ANSI color codes from supervisord status output

ochinchina/supervisord wraps each 'ctl status' line in ANSI color
escape codes. The consumer-restart path's awk lookup matched on
'^<proc>_[0-9]+', which never matched because the line actually
started with the escape sequence, so a stuck consumer could not be
restarted.

Author: dvasilas

.github/scripts/wait-for-backbeat-lifecycle.sh

@@ -71,9 +71,12 @@ check_consumer_stable() {
     # ctl uses the same socket as the running daemon. ochinchina's
     # restart expects the process name (e.g. lifecycle-bucket-processor_0
     # for numprocs=1), not the program name, so look it up via
-    # status rather than hardcoding the suffix.
+    # status rather than hardcoding the suffix. ochinchina prints
+    # status with ANSI color codes (e.g. \x1b[0;32m...\x1b[0m), so
+    # strip them before matching with awk.
     local proc
     proc=$(docker exec workbench-backbeat supervisord ctl -c /conf/supervisord.conf status \
+      | sed 's/\x1b\[[0-9;]*m//g' \
       | awk "/^${proc_prefix}_[0-9]+[[:space:]]/ {print \$1; exit}")
     if [ -z "$proc" ]; then
       echo "ERROR: ${proc_prefix} not found in supervisord status"