Couchbase server, if running, is not shut down before upgrading couchbase

[unhuman]

When running a cookbook that installs a different version of Couchbase, the cookbook does not shut down the existing instance, if it exists, before upgrading the binaries.

This causes Couchbase to crash. The upgrade still occurs, but data integrity may be compromised.

[majormoses]

@unhuman is this even with a minor version upgrade?