9376 - Fix the order of metadatablocks in templates

[scolapasta]

What this PR does / why we need it:

This fixes the order of the metadata blocks when viewing or editing templates.

Which issue(s) this PR closes:

Closes #9376

Special notes for your reviewer:

The changes made here were parallel to the changes made in #8772 .

So now, the Maps for metadata blocks in Template.java are TreeMaps. (note: metadata blocks were already made Comparable in that PR, so that change did not need to be carried over)

Suggestions on how to test this:

Create or edit or a template in a dataverse collection for a dataverse that has a custom block. Confirm that the order of the blocks is the same as they appear on the dataset page. (namely that Citation block is first)

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Technically, yes, in that it changes the order the blocks are displayed. But I wouldn't consider that a UI/UX change.

Is there a release notes update needed for this change?:

No

Additional documentation:

[coveralls]

Coverage: 20.009%. Remained the same when pulling 87cc21f on 9376-metadatablock-order-templates into ceffb6f on develop.

[qqmyers]

Makes sense. A clear parallel with the dataset case. The only minor comment I have is that I'm not sure that interfaces need to all be for a TreeMap - as long as the two constructors change from HashMap, the others could still be Map. That said, the dataset code did the same thing and it's a minor point, so not really worth a change.

[scolapasta]

@qqmyers I agree 100% about the interfaces, but since it was done that way for dataset, I decided to keep in that way here as well. Alternatively, we could switch back to Map and also change the ones in DatasetVersionUI? Not sure if it's worth the effort.

[qqmyers]

Yep - no change requested...

[kcondon]

I'm seeing all blocks, even ones not enabled, appearing when create template in a sub collection. Also, not sure how the ordering in create/edit dataset happens, citation is first but the others can't determine what ordering criteria is used.

This was a misunderstanding where on dataset create, only those blocks that have required fields are shown. Otherwise, create template and edit dataset block list are the same.