upgrade go-sdk to v0.2.7 and vendor deps

[nitishkumar71]

Description

• Upgrade go-sdk bump version to v0.27
• Apply go mod tidy
• Apply go mod vendor

Motivation and Context

• [x] I have raised an issue to propose this change (required) Closes #981

  How Has This Been Tested?

  All the commands has been tested with local builds for faasd. As faasd does not support annotation and only faas-netes pro can support namespace functionality. We have only validated, if existing functions are working as expected.

1. namespace create command

   faas-cli ns create ns-demo --label demo=true

   output

   Creating Namespace: ns-demo
   Namespace ns-demo Created!

2. namespace list command

   faas-cli ns ls

   output

   Namespaces:
   - ns-demo
   - openfaas-fn

3. namespace get command

   faas-cli ns get ns-demo

   output

   Name: ns-demo
   Labels:
   demo: true
   openfaas: 1

4. namespace update command

   faas-cli ns update ns-demo --label demo=false
   faas-cli ns get ns-demo

   output

   
   Updating Namespace: ns-demo
   Namespace ns-demo Updated!
   Name: ns-demo
   Labels:
   demo: false
   openfaas: 1

5. namespace delete command

faas-cli ns delete ns-demo faas-cli ns ls

output

Deleting Namespace: ns-demo Namespace ns-demo Deleted! Namespaces:

• openfaas-fn

  
  ## Types of changes
  <!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
  - [x] Bug fix (non-breaking change which fixes an issue)
  - [ ] New feature (non-breaking change which adds functionality)
  - [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I've read the CONTRIBUTION guide
• [x] I have signed-off my commits with git commit -s
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.