jenkins/scripts/copy_puppet_logs: copy apache logs only if exist
jenkins/scripts/copy_puppet_logs: copy apache logs only if exist

Copy Apache logs only if the directory exits.
Otherwise, if Apache is not installed, the script will fail.

Change-Id: I7f76a99e7cf2023bfdf6f59c98adf20da14d92bb

noorul/os-project-config,dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,dongwenjuan/project-config,noorul/os-project-config