Use mono 4.0.1 instead of mono 4.1.0 according to aspnet/home, change vs...

[yanchenw]

Use mono 4.0.1 instead of mono 4.1.0 as aspnet/home suggested:
https://github.com/aspnet/Home/blob/dev/GettingStartedDeb.md

Change vs-1.0.0-beta4 to based on official aspnet:1.0.0-beta4 to keep them consistent.

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[ahmetb]

@yanchenw thanks for the PR! I will hold off until this PR until mono:4.1.0 is tagged on Docker Hub if there's no urgent need?

[yanchenw]

Should be OK. Any idea when mono 4.1.0 will be tagged?

[ahmetb]

@yanchenw nope but once it appears at https://github.com/mono/mono/tags it'll probably take a day or so.

[akoeplinger]

Mono 4.1 (like all odd subversions) is the "in development" version and typically won't receive a tag.

[ahmetb]

@akoeplinger Oh, I didn't know that convention. It is apparently case with mono Docker images as well: https://registry.hub.docker.com/u/library/mono/

I guess we could still use 4.1.0 release by doing apt-get install mono from Mono's repositories? In that case, this PR seems like the only solution.

[ahmetb]

there's no need for this folder anymore.

I will make this point to 1.0.0-beta4 folder on Docker Hub settings once merged and 1.0.0-beta4 and vs-1.0.0-beta4 will be the same image that way.

[yanchenw]

Removed

[akoeplinger]

I guess we could still use 4.1.0 release by doing apt-get install mono from Mono's repositories?

4.1 will never be in the repositories, it'll be declared 4.2 once it's "stable".

[ahmetb]

@akoeplinger ok I was deceived by the apt-get install mono-complete @yanchenw does in the beta4 dockerfile... There's a mono:4.0.1, why don't we just use that if we're switching to 4.0.1?

[ahmetb]

@yanchenw thanks for the change. Merging assuming you tested the product that uses the vs-* image.

[ahmetb]

Waiving CLA since @yanchenw is a MSFT employee (he's registering himself to the CLA system now).