Error Handling Framework: Orchestration changes to report SAI API failures

[sivamukka]

Error handling framework is responsible for notifying ASIC/SAI programming failures to the applications.

Changes in OrchAgent includes:

• Receives notifications from syncd
• Process the notifications from syncd and logs the errors into error database
• Notify the status to registered applications
• Clear the error database entries based on the CLI command

Dependent PRs: https://github.com/Azure/sonic-swss-common/pull/309

Related PRs: https://github.com/Azure/sonic-utilities/pull/666 https://github.com/Azure/sonic-sairedis/pull/523

Signed-off-by: Siva Mukka ([email protected])