Fixing adding cf resources to etcd and networking stack - master

[omar-nahhas]

Based on the existing test, it seems that the intent was that etcd and networking stacks both could benefit from the cloud formation resources included in the plugins. Unfortunately, there was a bug in the template (in the case of etcd) and missing logic in the case of the networking stack that prevented it from happening.

• Enable plugin cf resources for networking stack
• Fixing etcd template to add plugin cf resources

[k8s-ci-robot]

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[omar-nahhas]

/assign @davidmccormick

[codecov-io]

Codecov Report

Merging #1553 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #1553      +/-   ##
==========================================
- Coverage   25.47%   25.46%   -0.02%     
==========================================
  Files          97       97              
  Lines        5016     5019       +3     
==========================================
  Hits         1278     1278              
- Misses       3591     3594       +3     
  Partials      147      147

Impacted Files	Coverage Δ
pkg/api/plugin.go	0% <ø> (ø)	⬆️
pkg/model/stack_new.go	32.29% <0%> (-0.62%)	⬇️

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[davidmccormick]

Thanks very much for your contribution! 🙏

[omar-nahhas]

Manually tested, an upgrade from 0.12 to 0.13 (with plugins migration), including a plugin that put some cf code (a Prometheus asg) inside the network stack.