Reworking of App-Mesh adapter

[Shreyas220]

Description
Made some changes according to the design spec for adapter

This PR fixes #40

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[Shreyas220]

thanks for the review @DelusionalOptimist
now we are able to do the following operation

• installing app-mesh
• installing sample application

will get the other operation working soon as well
excited to get this adapter up and running 😄😄

@sayantan1413 can we get that workflows up before merging this PR

[leecalcote]

Wow! That screenshot is exciting!

[Shreyas220]

when i run the smi conformance operation i get this error
@DelusionalOptimist @Utkarsh-pro

ERRO[2021-09-05T14:13:13+05:30] rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial tcp [::1]:31944: connect: connection refused" app=app-mesh-adapter code=1011 probable-cause= severity=2 short-description="Error running SMI conformance test" suggested-remediation=

[DelusionalOptimist]

@Shreyas220 you need a load-balancer to expose SMI conformance tool. There should be a guide somewhere to do so based on your k8s cluster.

[Shreyas220]

@DelusionalOptimist @Utkarsh-pro looks like we are able to do all the operation but the the app-mes-controller image is imagepullbackoff
so any ideas on how should we proceed ?

[DelusionalOptimist]

Some good work going on by @Shreyas220. : )
After a little debugging session and some changes in this PR, the adapter and app-mesh controller using the adapter installs well in-cluster (EKS). No IAM issues 👍

Action items now:

• See what app-mesh components, other than the controller are needed to do a usable app-mesh deployment.
• Try deploying sample apps and make sure services are being meshed.
• Show the adapter in Meshery UI.