fix ContainerEnvironmentConfig ResourceId

[et1975]

This PR closes ResourceId issue mentioned in #922

The changes in this PR are as follows:

• ContainerEnvironmentConfig to use managedEnvironments-based ResourceId.

I have read the contributing guidelines and have completed the following:

• Tested my code end-to-end against a live Azure subscription.
• Updated the documentation in the docs folder for the affected changes.
• Written unit tests against the modified code that I have made.
• Updated the release notes with a new entry for this PR.
• Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

If I haven't completed any of the tasks above, I include the reasons why here:
seems pretty straight-forward.

[isaacabraham]

Thanks!

[ninjarobot]

Thanks for the contribution, this is included in 1.7.2 and available on nuget.