Add support for Classic ELB

[rbellamy]

Please add support for classic ELB (ELBv1).

One of the superior features of awless is that it provides a dependency graph of entities - and though the Application ELB (ELBv2) is the most recent offering by AWS, there are going to be a huge number of extant Classic ELB's running out there - and having a good idea of their dependencies will provide an excellent utility when trying to upgrade them.

Furthermore, even today most tools provision Classic ELBs when managing AWS for you - for instance, current Kubernetes tooling creates ELBv1 entities.

[javipolo]

I was struggling to see my classic load balancers and I finally arrived here

+1 to this feature, we use classic ELBs intensively and it's a pity not being able to use awless on them :(

Same here, ELBV1 load balancers surprisingly aren't supported
+1 to the feature

[simcap]

@rbellamy @javipolo @yuriipolishchuk-finsight It has been done into master. Feel free to test it

[simcap]

@rbellamy @javipolo @yuriipolishchuk-finsight Forgot to point to how to use it:

• use awless ls classicloadbalancers, awless create classicloadbalancer -h
• here is a template with a full example