Autodiscovery

[jnichols-git]

Addresses #609

Implementation of automatic service discovery as an interface, with current implementation supporting discovery of kubernetes resources in a cluster pointed to by the local kubeconfig. Draft PR while implementing new discovery methods and more thorough testing--want to have the current work publicly-facing to allow for easier testing and feedback.

[coveralls]

Pull Request Test Coverage Report for Build 3175866858

• 103 of 159 (64.78%) changed or added relevant lines in 11 files are covered.
• 5 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.3%) to 94.083%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/autodiscovery/options/options.go	17	19	89.47%
pkg/autodiscovery/queries/options.go	21	23	91.3%
pkg/autodiscovery/templates/options.go	13	15	86.67%
pkg/backends/alb/options/options.go	1	3	33.33%
pkg/backends/options/options.go	1	3	33.33%
pkg/autodiscovery/autodiscovery.go	30	35	85.71%
pkg/util/copiers/copiers.go	0	6	0.0%
pkg/backends/alb/client.go	15	23	65.22%
pkg/routing/routing.go	4	16	25.0%
pkg/util/strings/strings.go	0	15	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/backends/alb/client.go	1	84.8%
pkg/cache/bbolt/bbolt.go	4	88.55%

Totals
Change from base Build 3175847764:	-0.3%
Covered Lines:	16124
Relevant Lines:	17138

---

💛 - Coveralls

[jnichols-git]

A combination of old, unmerged code and forgetting to sign off on a couple of commits has made this PR too unwieldy. I have fixed locally and will make a new PR that is more up to date.