Added Controller Name to Controller related Metrics

This release adds the following fixes and features:

• Add the controller name as a label (controller_name) to all metrics related to controller metrics.
• Use pflag package for flag handling.
• BREAKING Replaced --debug flag with --log-level=LEVEL.
• BREAKING Fixed name of --omreport flag (was --omr_report).
• BREAKING --docker flag has been removed.
• Updated all go mods to latest version

NOTE Due to issues with the CI script, the artifacts had to manually downloaded from the CI and uploaded to this release.

Fix version information

This primarily fixes that no version information is displayed when using the --version flag and / or the version info in the logs during startup.

Additionally some smaller issues have been fixed as well.

Updated CI / build to use Golang 1.13

Use Golang 1.13 for CI and build from now on.

Added omreport command timeout flag

This release adds a new flag -collectors.cmd-timeout int (default 15). The value is in seconds.
The flag enables you to set your own timeout for the omreport command execution.

Dell Packages Repo updated to DSU_18.08.00

Merge pull request #13 from juliantaylor/dsu-update

update to DSU_18.08.00

Fix CI cache restore checkout failure

Remove repo checkout from cache

It causes issues under certain conditions.

Dell Packages Repo updated to DSU_18.06.00

This tag fixes the tag build and is now an automatically build again.

See v1.3.4 for a build that was correctly built automatically by the CI system.

Dell Packages Repo updated to DSU_18.06.00

This version includes the following changes and/or features:

• Updated linux.dell.com repository to DSU_18.06.00
• Fixed badge link in README
• Use Circle CI 2.0 config for tests, build and publish

WARNING This release had to be built and pushed manually, due to issues with Circle CI 2 not building tags.
This will be fixed as soon as the issue has been identified.

Monitoring contrib added and improved code quality

This release will be unmarked as a pre-release when the build pipeline has been fixed!

A contrib/monitoring/ directory has been added, which contains a Grafana dashboard for virtual disks and a few example Prometheus 2 Alerts.

Thanks to @dhoeld and the company I work at for the dashboard and Prometheus alerts!

The code quality has been improved by adding comments to each function.

NICs and Chassis Batteries metrics added

This release adds/changes/fixes:

• NICs connection status
• Chassis batteries (CMOS)