Retrieves details of a single region for a given plugin.
Roles : [ROLE_AUTHENTICATED]
- CPP-1 - remote service not found
- GEN-21 - The requested plugin is not a cloud provider plugin type
- GEN-23 - The operation requires authentication to the provider and the X-Abiquo-PCR-Identity, X-Abiquo-PCR-Credential and X-Abiquo-PCR-Endpoint headers must be set
- REGION-2 - Region not found in the provider plugin