Catch puppetdb sync-wait exit code and continue

When the replica is upgraded and PuppetDB sync doesn't complete within
15 minutes, the upgrade command exits with exitstatus 11. This should
not be a condition in which the upgrade plan fails; the upgrade plan
should proceed forward in this case. There are many reasons why
PuppetDB sync might not complete quickly, but it's not a reason not
to continue upgrading the compilers. Upgrading the remaining
compilers will result in a more stable deployment than not upgrading
them, whatever the reason for PuppetDB sync being incomplete/slow.

Author: reidmv

CHANGELOG.md

@@ -1,5 +1,12 @@
 # PEADM module
 
+## UNRELEASED
+### Summary
+
+### Improvements
+
+- Handle exit code 11 from replica upgrade (still waiting for PuppetDB sync to complete) gracefully.
+
 ## 2.4.5
 ### Summary
 

tasks/puppet_infra_upgrade.rb

@@ -27,8 +27,10 @@ def main
   puts stdouterr
   if status.success?
     exit 0
+  elsif status.exitstatus == 11 # Waiting for PuppetDB sync to complete, but otherwise successful
+    exit 0
   else
-    exit 1
+    exit status.exitstatus
   end
 end