Support multiple Models Info with the same VID/PID but different versions

[ashcherbakov]

Acceptance criteria:

• Vendors need to be able to publish new versions of the same model (same VID/PID combination).
• New versions are identified by a combination of firmware_version and hardware_version,
• Every new version is published in non-certified state. So, Test Results publishing and compliance certification need to specify firmware_version and hardware_version in addition to pid and vid.
• hardware_version can be an optional field in the future

Technical tasks:

• vid/pid/hw_ver/fw_ver needs to be a key for ModelInfos, Compliance tests and certifications results
• There needs to be an index for the vid/pid to a list of versions
• GET_MODEL_INFO by VID/PID returns a list of all versions of the model
• There needs to be a way to get a particular version of the model info by specifying vid, pid, firmware_version and hardware_version. It can be either a new command, or a query parameter to the existing GET_MODEL_INFO command.
• GET_ALL_MODEL_INFO and GET_VENDOR_MODEL_INFO need to return firmware_version and hardware_version fields
• firmware_version and hardware_version fields needs to be included into ADD_TEST_RESULT and GET_TEST_RESULT
• firmware_version and hardware_version fields needs to be included into CERTIFY_MODEL, REVOKE_MODEL_CERTIFICATION, GET_CERTIFIED_MODEL, GET_REVOKED_MODEL

[ashcherbakov]

PR: #91