Fix init scripts with product support

[johnlawerance]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: All supported versions
• Ruby: All supported versions
• Distribution: All supported distros
• Module version: 2.0.0

How to reproduce (e.g Puppet code you use)

Change product from stash to bitbucket:
stash::product: 'bitbucket'

What are you seeing

When the init script runs it attempts to execute start-stash.sh which is named start-bitbucket.sh on bitbucket server.

What behaviour did you expect instead

It should pull in the variable from the module settings.

Output log

Error: /Stage[main]/Stash::Service/Service[stash]/ensure: change from stopped to running failed: Could not start Service[stash]: Execution of '/sbin/service stash start' returned 127: Starting stash: /etc/init.d/stash: line 55: /opt/grubhub/services/stash_installdir/atlassian-bitbucket-4.14.6/bin/start-stash.sh: No such file or directory

Any additional information you'd like to impart

Incoming fix for this.