Remove github.com/hashicorp/consul/ dependency

[eikenb]

Only github.com/hashicorp/consul/api and github.com/hashicorp/consul/sdk are designed to be externally imported. All other imports of consul need to be removed. This includes...

• github.com/hashicorp/consul/logger
• github.com/hashicorp/consul/command/flags
• github.com/hashicorp/consul/agent/checks
• github.com/hashicorp/consul/agent/structs
• github.com/hashicorp/consul/lib
• github.com/hashicorp/consul/types

Either need to replace what it is importing or cut-n-paste into a local file.

[eikenb]

At this point only these 2 were low hanging fruit and were easy to remove.

github.com/hashicorp/consul/command/flags
github.com/hashicorp/consul/agent/structs

All the rest will require significant amounts of work that should wait until I better understand the code base.