Add Description for Azure RMService Connection

[arturopolanco]

PR Summary

Description field is added to the "Add-VSTeamAzureRMServiceEndpoint" cmdlet. As it is already part of the AzDo API is enough to add it to the JSON object and parse it to "Add-VSTeamServiceEndpoint"

PR Checklist

• [x] Write Help
• [x] Write Unit Test
• [x] Update CHANGELOG.md

[SebastianSchuetze]

@arturopolanco somehow the reference is not found when running unit tests on Ubuntu.

[SebastianSchuetze]

Also please update the version in the psd1 file.

[arturopolanco]

@arturopolanco somehow the reference is not found when running unit tests on Ubuntu.

Hey Sebastian, there was a wrong reference, I should work now. let me know how it goes