While generating hash for ambari-server to fill agent cache, all the symlinks should be traversed too.

the archive.zip and .hash is not getting generated on the server side when the package folder is under
stacks/<stack-name>/<stack-version>/services/<service-name>/package
instead of common-services/<service-name>/<service-version>/package
On closer look, the issue was that when the directories are being traversed to look for hooks and package folders that need to be hashed/archived for having it in the agent cache, those directories that were symlinks were being skipped.
Fix is to include them.