Inconsistent org/organization usage

[bart-vmware]

Searching the codebase, we have:

• AddOrgAndSpacePolicies
• CertificateAuthorizationPolicies.SameOrganization

The public API surface, comments and internals should be updated to reflect a single style.
I suggest spelling out "organization" everywhere.

[TimHess]

Hmm... I would generally prefer to use "Org" since (in my experience) that's how it's most commonly referred to... some examples:

• https://docs.cloudfoundry.org/concepts/roles.html#orgs
• https://tutorials.cloudfoundry.org/cf4devs/core-concepts/orgs-and-spaces/
• Many (most?) cf cli commands and help text

But the identity certificates definitely do use organization= (Steeltoe code for parsing the certs)

[bart-vmware]

I agree we should go with "org", as that seems to be the conceptual name in use. The OU in the certificate is an implementation detail.