Update snapctl output for metric and metric catalog with metric schema changes

[geauxvirtual]

This PR updates the output of snapctl to include the latest metric schema changes for a single metric or a group of metrics returned during a metric query.

** Note: Due to other flags using -v for flags, this PR also removes -v from the verbose flag. Use of verbose will require specifying --verbose

Summary of changes:

• Add Description, Unit, and Dynamic Elements for namespaces to the output of snapctl commands for returning a single metric or a list of metrics.
• Add --verbose flag to metric list command to expand out metrics to populate namespace with dynamic elements and include Unit and Description in the output.
• Remove -v from the verbose flag as other flags also use -v.

Sample output of the changes:

Testing done:

• Verified outputs of snapctl for metric list, metric list --verbose and metric get

@intelsdi-x/snap-maintainers

[pittma]

🚢

[marcin-krolik]

👍