CloudWatch Broker logging Support

Implements broker logging configuration to Cloudwatch.

Allows Tagging of Resources

Provides an array of tags that can be passed to resources. Allows to set tagging by

• tags - set tags on all resources including submodules
• vpc_tags - set tags on the vpc sub module resources only
• msk_cluster_tags - set tags for msk cluster resources only
• monitoring_tags - set tags for all dashboard and metric resources

The client-instance sub module takes its own tag parameter as this is not created from within the MSK module

Module support for Terraform 0.12.6

The module has been refactored and upgraded to support Terraform 0.12.6 and above.